diff --git a/README.md b/README.md
index 455bd259..29ec608b 100644
--- a/README.md
+++ b/README.md
@@ -325,6 +325,54 @@ sequencer.insertSteps({
 return value: **`sequencer`** (To allow method chaining)
 
 
+## Creating a User Interface
+
+Image Sequencer provides the following events which can be used to generate a UI:
+
+* `onSetup` : this event is triggered when a new module is set up. This can be used,
+for instance, to generate a DIV element to store the generated image for that step.
+* `onDraw` : This event is triggered when Image Sequencer starts drawing the output
+for a module. This can be used, for instance, to overlay a loading GIF over the DIV
+generated above.
+* `onComplete` : This event is triggered when Image Sequencer has drawn the output
+for a module. This can be used, for instance, to update the DIV with the new image
+and remove the loading GIF generated above.
+* `onRemove` : This event is triggered when a module is removed. This can be used,
+for instance, to remove the DIV generated above.
+
+How to define these functions:
+
+```js
+sequencer.setUI({
+  onSetup: function() {},
+  onDraw: function() {},
+  onComplete: function(output) {},
+  onRemove: function() {}
+});
+```
+
+These methods can be defined and re-defined at any time, but it is advisable to
+set them before any module is added and not change it thereafter. This is because
+the `setUI` method will only affect the modules added after `setUI` is called.
+
+The `onComplete` event is passed on the output of the module.
+
+In the scope of all these events, the following variables are present, which
+may be used in generating the UI:
+* The object `identity`
+```
+identity = {
+  stepName: "Name of the Step",
+  stepID: "A unique ID given to the step",
+  imageName: "The name of the image to which the step is added."
+}
+```
+* The variable `options.inBrowser` which is a Boolean and is `true` if the client is a browser and `false` otherwise.
+
+Note: `identity.imageName` is the "name" of that particular image. This name can be specified
+while loading the image via `sequencer.loadImage("name","SRC")`. If not specified,
+the name of a loaded image defaults to a name like "image1", "image2", et cetra.
+
 ## Contributing
 
 Happily accepting pull requests; to edit the core library, modify files in `/src/`. To build, run `npm install` and `grunt build`.
diff --git a/dist/image-sequencer.js b/dist/image-sequencer.js
index 30f2e76e..c3946ed2 100644
--- a/dist/image-sequencer.js
+++ b/dist/image-sequencer.js
@@ -359,7 +359,7 @@ var objectKeys = Object.keys || function (obj) {
   return keys;
 };
 
-},{"util/":114}],2:[function(require,module,exports){
+},{"util/":111}],2:[function(require,module,exports){
 'use strict'
 
 exports.byteLength = byteLength
@@ -476,186 +476,8 @@ function fromByteArray (uint8) {
 }
 
 },{}],3:[function(require,module,exports){
-var Base64Encode = require('./lib/encode');
-var Base64Decode = require('./lib/decode');
 
-module.exports = {
-	Encode : Base64Encode,
-	encode : Base64Encode,
-	Decode : Base64Decode,
-	decode : Base64Decode
-};
-
-},{"./lib/decode":4,"./lib/encode":5}],4:[function(require,module,exports){
-(function (Buffer){
-module.exports = Base64Decode;
-
-var Transform = require('stream').Transform || require('readable-stream').Transform;
-require('util').inherits(Base64Decode, Transform);
-
-/**
- * Decodes a Base64 data stream, coming in as a string or Buffer of UTF-8 text, into binary Buffers.
- * @returns {Base64Decode}
- * @constructor
- */
-function Base64Decode() {
-	if ( !(this instanceof Base64Decode) )
-		return new Base64Decode();
-
-	Transform.call(this, {
-		// The input is converted to strings, so no need to transform input strings to buffers
-		decodeStrings : false
-	});
-
-	// Any extra chars from the last chunk
-	this.extra = '';
-}
-
-/**
- * Decodes a Base64 data stream, coming in as a string or Buffer of UTF-8 text, into binary Buffers.
- * @param {Buffer|string} chunk
- * @param encoding
- * @param cb
- * @private
- */
-Base64Decode.prototype._transform = function (chunk, encoding, cb) {
-	// Convert chunk to a string
-	chunk = '' + chunk;
-
-	// Add previous extra and remove any newline characters
-	chunk = this.extra + chunk.replace(/(\r\n|\n|\r)/gm, '');
-
-	// 4 characters represent 3 bytes, so we can only decode in groups of 4 chars
-	var remaining = chunk.length % 4;
-
-	// Store the extra chars for later
-	this.extra = chunk.slice(chunk.length - remaining);
-	chunk = chunk.slice(0, chunk.length - remaining);
-
-	// Create the new buffer and push
-	var buf = new Buffer(chunk, 'base64');
-	this.push(buf);
-	cb();
-};
-
-/**
- * Emits 1, 2, or 3 extra characters of base64 data.
- * @param cb
- * @private
- */
-Base64Decode.prototype._flush = function (cb) {
-	if ( this.extra.length )
-		this.push(new Buffer(this.extra, 'base64'));
-
-	cb();
-};
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":10,"readable-stream":98,"stream":106,"util":114}],5:[function(require,module,exports){
-(function (Buffer){
-module.exports = Base64Encode;
-
-var Transform = require('stream').Transform || require('readable-stream').Transform;
-require('util').inherits(Base64Encode, Transform);
-
-/**
- * Transforms a Buffer stream of binary data to a stream of Base64 text. Note that this will
- * also work on a stream of pure strings, as the Writeable base class will automatically decode
- * text string chunks into Buffers.
- * @returns {Base64Encode}
- * @constructor
- */
-function Base64Encode(lineLength) {
-	if ( !(this instanceof Base64Encode) )
-		return new Base64Encode(lineLength);
-
-	Transform.call(this);
-
-	// Any extra chars from the last chunk
-	this.extra = null;
-
-	this.lineLength = lineLength;
-
-	this.currLineLength = 0;
-}
-
-/**
- * Adds \r\n as needed to the data chunk to ensure that the output Base64 string meets
- * the maximum line length requirement.
- * @param {string} chunk
- * @returns {string}
- * @private
- */
-Base64Encode.prototype._fixLineLength = function (chunk) {
-	// If we care about line length, add line breaks
-	if ( !this.lineLength )
-		return chunk;
-
-	var size = chunk.length;
-	var needed = this.lineLength - this.currLineLength;
-	var start, end;
-
-	var _chunk = '';
-	for ( start = 0, end = needed; end < size; start = end, end += this.lineLength ) {
-		_chunk += chunk.slice(start, end);
-		_chunk += '\r\n';
-	}
-
-	var left = chunk.slice(start);
-	this.currLineLength = left.length;
-
-	_chunk += left;
-
-	return _chunk;
-};
-
-/**
- * Transforms a Buffer chunk of data to a Base64 string chunk.
- * @param {Buffer} chunk
- * @param {string} encoding - unused since chunk is always a Buffer
- * @param cb
- * @private
- */
-Base64Encode.prototype._transform = function (chunk, encoding, cb) {
-	// Add any previous extra bytes to the chunk
-	if ( this.extra ) {
-		chunk = Buffer.concat([this.extra, chunk]);
-		this.extra = null;
-	}
-
-	// 3 bytes are represented by 4 characters, so we can only encode in groups of 3 bytes
-	var remaining = chunk.length % 3;
-
-	if ( remaining !== 0 ) {
-		// Store the extra bytes for later
-		this.extra = chunk.slice(chunk.length - remaining);
-		chunk = chunk.slice(0, chunk.length - remaining);
-	}
-
-	// Convert chunk to a base 64 string
-	chunk = chunk.toString('base64');
-
-	// Push the chunk
-	this.push(this._fixLineLength(chunk));
-	cb();
-};
-
-/**
- * Emits 0 or 4 extra characters of Base64 data.
- * @param cb
- * @private
- */
-Base64Encode.prototype._flush = function (cb) {
-	if ( this.extra )
-		this.push(this._fixLineLength(this.extra.toString('base64')));
-
-	cb();
-};
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":10,"readable-stream":98,"stream":106,"util":114}],6:[function(require,module,exports){
-
-},{}],7:[function(require,module,exports){
+},{}],4:[function(require,module,exports){
 (function (process,Buffer){
 var msg = require('pako/lib/zlib/messages');
 var zstream = require('pako/lib/zlib/zstream');
@@ -895,7 +717,7 @@ Zlib.prototype._error = function(status) {
 exports.Zlib = Zlib;
 
 }).call(this,require('_process'),require("buffer").Buffer)
-},{"_process":87,"buffer":10,"pako/lib/zlib/constants":55,"pako/lib/zlib/deflate.js":57,"pako/lib/zlib/inflate.js":59,"pako/lib/zlib/messages":61,"pako/lib/zlib/zstream":63}],8:[function(require,module,exports){
+},{"_process":84,"buffer":7,"pako/lib/zlib/constants":52,"pako/lib/zlib/deflate.js":54,"pako/lib/zlib/inflate.js":56,"pako/lib/zlib/messages":58,"pako/lib/zlib/zstream":60}],5:[function(require,module,exports){
 (function (process,Buffer){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -1509,9 +1331,9 @@ util.inherits(InflateRaw, Zlib);
 util.inherits(Unzip, Zlib);
 
 }).call(this,require('_process'),require("buffer").Buffer)
-},{"./binding":7,"_process":87,"_stream_transform":99,"assert":1,"buffer":10,"util":114}],9:[function(require,module,exports){
-arguments[4][6][0].apply(exports,arguments)
-},{"dup":6}],10:[function(require,module,exports){
+},{"./binding":4,"_process":84,"_stream_transform":96,"assert":1,"buffer":7,"util":111}],6:[function(require,module,exports){
+arguments[4][3][0].apply(exports,arguments)
+},{"dup":3}],7:[function(require,module,exports){
 (function (global){
 /*!
  * The buffer module from node.js, for the browser.
@@ -3304,14 +3126,14 @@ function isnan (val) {
 }
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"base64-js":2,"ieee754":39,"isarray":11}],11:[function(require,module,exports){
+},{"base64-js":2,"ieee754":36,"isarray":8}],8:[function(require,module,exports){
 var toString = {}.toString;
 
 module.exports = Array.isArray || function (arr) {
   return toString.call(arr) == '[object Array]';
 };
 
-},{}],12:[function(require,module,exports){
+},{}],9:[function(require,module,exports){
 (function (Buffer){
 /**!
  * contentstream - index.js
@@ -3360,12 +3182,12 @@ ContentStream.prototype._read = function (n) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10,"readable-stream":19,"util":114}],13:[function(require,module,exports){
+},{"buffer":7,"readable-stream":16,"util":111}],10:[function(require,module,exports){
 module.exports = Array.isArray || function (arr) {
   return Object.prototype.toString.call(arr) == '[object Array]';
 };
 
-},{}],14:[function(require,module,exports){
+},{}],11:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -3458,7 +3280,7 @@ function forEach (xs, f) {
 }
 
 }).call(this,require('_process'))
-},{"./_stream_readable":16,"./_stream_writable":18,"_process":87,"core-util-is":21,"inherits":40}],15:[function(require,module,exports){
+},{"./_stream_readable":13,"./_stream_writable":15,"_process":84,"core-util-is":18,"inherits":37}],12:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -3506,7 +3328,7 @@ PassThrough.prototype._transform = function(chunk, encoding, cb) {
   cb(null, chunk);
 };
 
-},{"./_stream_transform":17,"core-util-is":21,"inherits":40}],16:[function(require,module,exports){
+},{"./_stream_transform":14,"core-util-is":18,"inherits":37}],13:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -4492,7 +4314,7 @@ function indexOf (xs, x) {
 }
 
 }).call(this,require('_process'))
-},{"_process":87,"buffer":10,"core-util-is":21,"events":26,"inherits":40,"isarray":13,"stream":106,"string_decoder/":20}],17:[function(require,module,exports){
+},{"_process":84,"buffer":7,"core-util-is":18,"events":23,"inherits":37,"isarray":10,"stream":103,"string_decoder/":17}],14:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -4704,7 +4526,7 @@ function done(stream, er) {
   return stream.push(null);
 }
 
-},{"./_stream_duplex":14,"core-util-is":21,"inherits":40}],18:[function(require,module,exports){
+},{"./_stream_duplex":11,"core-util-is":18,"inherits":37}],15:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -5094,7 +4916,7 @@ function endWritable(stream, state, cb) {
 }
 
 }).call(this,require('_process'))
-},{"./_stream_duplex":14,"_process":87,"buffer":10,"core-util-is":21,"inherits":40,"stream":106}],19:[function(require,module,exports){
+},{"./_stream_duplex":11,"_process":84,"buffer":7,"core-util-is":18,"inherits":37,"stream":103}],16:[function(require,module,exports){
 (function (process){
 var Stream = require('stream'); // hack to fix a circular dependency issue when used with browserify
 exports = module.exports = require('./lib/_stream_readable.js');
@@ -5109,7 +4931,7 @@ if (!process.browser && process.env.READABLE_STREAM === 'disable') {
 }
 
 }).call(this,require('_process'))
-},{"./lib/_stream_duplex.js":14,"./lib/_stream_passthrough.js":15,"./lib/_stream_readable.js":16,"./lib/_stream_transform.js":17,"./lib/_stream_writable.js":18,"_process":87,"stream":106}],20:[function(require,module,exports){
+},{"./lib/_stream_duplex.js":11,"./lib/_stream_passthrough.js":12,"./lib/_stream_readable.js":13,"./lib/_stream_transform.js":14,"./lib/_stream_writable.js":15,"_process":84,"stream":103}],17:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -5332,7 +5154,7 @@ function base64DetectIncompleteChar(buffer) {
   this.charLength = this.charReceived ? 3 : 0;
 }
 
-},{"buffer":10}],21:[function(require,module,exports){
+},{"buffer":7}],18:[function(require,module,exports){
 (function (Buffer){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -5443,7 +5265,7 @@ function objectToString(o) {
 }
 
 }).call(this,{"isBuffer":require("../../is-buffer/index.js")})
-},{"../../is-buffer/index.js":42}],22:[function(require,module,exports){
+},{"../../is-buffer/index.js":39}],19:[function(require,module,exports){
 "use strict"
 
 var createThunk = require("./lib/thunk.js")
@@ -5554,7 +5376,7 @@ function compileCwise(user_args) {
 
 module.exports = compileCwise
 
-},{"./lib/thunk.js":24}],23:[function(require,module,exports){
+},{"./lib/thunk.js":21}],20:[function(require,module,exports){
 "use strict"
 
 var uniq = require("uniq")
@@ -5914,7 +5736,7 @@ function generateCWiseOp(proc, typesig) {
 }
 module.exports = generateCWiseOp
 
-},{"uniq":109}],24:[function(require,module,exports){
+},{"uniq":106}],21:[function(require,module,exports){
 "use strict"
 
 // The function below is called when constructing a cwise function object, and does the following:
@@ -6002,7 +5824,7 @@ function createThunk(proc) {
 
 module.exports = createThunk
 
-},{"./compile.js":23}],25:[function(require,module,exports){
+},{"./compile.js":20}],22:[function(require,module,exports){
 (function (Buffer){
 
 /**
@@ -6060,7 +5882,7 @@ function dataUriToBuffer (uri) {
 }
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10}],26:[function(require,module,exports){
+},{"buffer":7}],23:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -6364,7 +6186,7 @@ function isUndefined(arg) {
   return arg === void 0;
 }
 
-},{}],27:[function(require,module,exports){
+},{}],24:[function(require,module,exports){
 (function (Buffer,process){
 'use strict'
 
@@ -6502,7 +6324,7 @@ module.exports = function getPixels(url, type, cb) {
   }
 }
 }).call(this,{"isBuffer":require("../is-buffer/index.js")},require('_process'))
-},{"../is-buffer/index.js":42,"_process":87,"data-uri-to-buffer":25,"ndarray":51,"ndarray-pack":49,"omggif":52,"path":64,"through":108}],28:[function(require,module,exports){
+},{"../is-buffer/index.js":39,"_process":84,"data-uri-to-buffer":22,"ndarray":48,"ndarray-pack":46,"omggif":49,"path":61,"through":105}],25:[function(require,module,exports){
 (function (Buffer){
 /*
   GIFEncoder.js
@@ -6975,7 +6797,7 @@ GIFEncoder.ByteCapacitor = ByteCapacitor;
 module.exports = GIFEncoder;
 
 }).call(this,require("buffer").Buffer)
-},{"./LZWEncoder.js":29,"./TypedNeuQuant.js":30,"assert":1,"buffer":10,"events":26,"readable-stream":37,"util":114}],29:[function(require,module,exports){
+},{"./LZWEncoder.js":26,"./TypedNeuQuant.js":27,"assert":1,"buffer":7,"events":23,"readable-stream":34,"util":111}],26:[function(require,module,exports){
 /*
   LZWEncoder.js
 
@@ -7189,7 +7011,7 @@ function LZWEncoder(width, height, pixels, colorDepth) {
 
 module.exports = LZWEncoder;
 
-},{}],30:[function(require,module,exports){
+},{}],27:[function(require,module,exports){
 /* NeuQuant Neural-Net Quantization Algorithm
  * ------------------------------------------
  *
@@ -7622,13 +7444,13 @@ function NeuQuant(pixels, samplefac) {
 
 module.exports = NeuQuant;
 
-},{}],31:[function(require,module,exports){
-arguments[4][13][0].apply(exports,arguments)
-},{"dup":13}],32:[function(require,module,exports){
-arguments[4][14][0].apply(exports,arguments)
-},{"./_stream_readable":34,"./_stream_writable":36,"_process":87,"core-util-is":21,"dup":14,"inherits":40}],33:[function(require,module,exports){
-arguments[4][15][0].apply(exports,arguments)
-},{"./_stream_transform":35,"core-util-is":21,"dup":15,"inherits":40}],34:[function(require,module,exports){
+},{}],28:[function(require,module,exports){
+arguments[4][10][0].apply(exports,arguments)
+},{"dup":10}],29:[function(require,module,exports){
+arguments[4][11][0].apply(exports,arguments)
+},{"./_stream_readable":31,"./_stream_writable":33,"_process":84,"core-util-is":18,"dup":11,"inherits":37}],30:[function(require,module,exports){
+arguments[4][12][0].apply(exports,arguments)
+},{"./_stream_transform":32,"core-util-is":18,"dup":12,"inherits":37}],31:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -8583,7 +8405,7 @@ function indexOf (xs, x) {
 }
 
 }).call(this,require('_process'))
-},{"./_stream_duplex":32,"_process":87,"buffer":10,"core-util-is":21,"events":26,"inherits":40,"isarray":31,"stream":106,"string_decoder/":38,"util":6}],35:[function(require,module,exports){
+},{"./_stream_duplex":29,"_process":84,"buffer":7,"core-util-is":18,"events":23,"inherits":37,"isarray":28,"stream":103,"string_decoder/":35,"util":3}],32:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -8794,7 +8616,7 @@ function done(stream, er) {
   return stream.push(null);
 }
 
-},{"./_stream_duplex":32,"core-util-is":21,"inherits":40}],36:[function(require,module,exports){
+},{"./_stream_duplex":29,"core-util-is":18,"inherits":37}],33:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -9275,7 +9097,7 @@ function endWritable(stream, state, cb) {
 }
 
 }).call(this,require('_process'))
-},{"./_stream_duplex":32,"_process":87,"buffer":10,"core-util-is":21,"inherits":40,"stream":106}],37:[function(require,module,exports){
+},{"./_stream_duplex":29,"_process":84,"buffer":7,"core-util-is":18,"inherits":37,"stream":103}],34:[function(require,module,exports){
 (function (process){
 exports = module.exports = require('./lib/_stream_readable.js');
 exports.Stream = require('stream');
@@ -9289,9 +9111,9 @@ if (!process.browser && process.env.READABLE_STREAM === 'disable') {
 }
 
 }).call(this,require('_process'))
-},{"./lib/_stream_duplex.js":32,"./lib/_stream_passthrough.js":33,"./lib/_stream_readable.js":34,"./lib/_stream_transform.js":35,"./lib/_stream_writable.js":36,"_process":87,"stream":106}],38:[function(require,module,exports){
-arguments[4][20][0].apply(exports,arguments)
-},{"buffer":10,"dup":20}],39:[function(require,module,exports){
+},{"./lib/_stream_duplex.js":29,"./lib/_stream_passthrough.js":30,"./lib/_stream_readable.js":31,"./lib/_stream_transform.js":32,"./lib/_stream_writable.js":33,"_process":84,"stream":103}],35:[function(require,module,exports){
+arguments[4][17][0].apply(exports,arguments)
+},{"buffer":7,"dup":17}],36:[function(require,module,exports){
 exports.read = function (buffer, offset, isLE, mLen, nBytes) {
   var e, m
   var eLen = nBytes * 8 - mLen - 1
@@ -9377,7 +9199,7 @@ exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
   buffer[offset + i - d] |= s * 128
 }
 
-},{}],40:[function(require,module,exports){
+},{}],37:[function(require,module,exports){
 if (typeof Object.create === 'function') {
   // implementation from standard node.js 'util' module
   module.exports = function inherits(ctor, superCtor) {
@@ -9402,7 +9224,7 @@ if (typeof Object.create === 'function') {
   }
 }
 
-},{}],41:[function(require,module,exports){
+},{}],38:[function(require,module,exports){
 "use strict"
 
 function iota(n) {
@@ -9414,7 +9236,7 @@ function iota(n) {
 }
 
 module.exports = iota
-},{}],42:[function(require,module,exports){
+},{}],39:[function(require,module,exports){
 /*!
  * Determine if an object is a Buffer
  *
@@ -9437,9 +9259,9 @@ function isSlowBuffer (obj) {
   return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
 }
 
-},{}],43:[function(require,module,exports){
-arguments[4][11][0].apply(exports,arguments)
-},{"dup":11}],44:[function(require,module,exports){
+},{}],40:[function(require,module,exports){
+arguments[4][8][0].apply(exports,arguments)
+},{"dup":8}],41:[function(require,module,exports){
 /*!
  * jQuery JavaScript Library v2.2.4
  * http://jquery.com/
@@ -19255,7 +19077,7 @@ if ( !noGlobal ) {
 return jQuery;
 }));
 
-},{}],45:[function(require,module,exports){
+},{}],42:[function(require,module,exports){
 (function webpackUniversalModuleDefinition(root, factory) {
 	if(typeof exports === 'object' && typeof module === 'object')
 		module.exports = factory();
@@ -21981,7 +21803,7 @@ return /******/ (function(modules) { // webpackBootstrap
 /******/ ])
 });
 ;
-},{}],46:[function(require,module,exports){
+},{}],43:[function(require,module,exports){
 (function (process){
 var path = require('path');
 var fs = require('fs');
@@ -22093,10 +21915,10 @@ mime.charsets = {
 module.exports = mime;
 
 }).call(this,require('_process'))
-},{"./types.json":47,"_process":87,"fs":9,"path":64}],47:[function(require,module,exports){
+},{"./types.json":44,"_process":84,"fs":6,"path":61}],44:[function(require,module,exports){
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-},{}],48:[function(require,module,exports){
+},{}],45:[function(require,module,exports){
 "use strict"
 
 var compile = require("cwise-compiler")
@@ -22559,7 +22381,7 @@ exports.equals = compile({
 
 
 
-},{"cwise-compiler":22}],49:[function(require,module,exports){
+},{"cwise-compiler":19}],46:[function(require,module,exports){
 "use strict"
 
 var ndarray = require("ndarray")
@@ -22582,10 +22404,10 @@ module.exports = function convert(arr, result) {
   return result
 }
 
-},{"./doConvert.js":50,"ndarray":51}],50:[function(require,module,exports){
+},{"./doConvert.js":47,"ndarray":48}],47:[function(require,module,exports){
 module.exports=require('cwise-compiler')({"args":["array","scalar","index"],"pre":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"body":{"body":"{\nvar _inline_1_v=_inline_1_arg1_,_inline_1_i\nfor(_inline_1_i=0;_inline_1_i<_inline_1_arg2_.length-1;++_inline_1_i) {\n_inline_1_v=_inline_1_v[_inline_1_arg2_[_inline_1_i]]\n}\n_inline_1_arg0_=_inline_1_v[_inline_1_arg2_[_inline_1_arg2_.length-1]]\n}","args":[{"name":"_inline_1_arg0_","lvalue":true,"rvalue":false,"count":1},{"name":"_inline_1_arg1_","lvalue":false,"rvalue":true,"count":1},{"name":"_inline_1_arg2_","lvalue":false,"rvalue":true,"count":4}],"thisVars":[],"localVars":["_inline_1_i","_inline_1_v"]},"post":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"funcName":"convert","blockSize":64})
 
-},{"cwise-compiler":22}],51:[function(require,module,exports){
+},{"cwise-compiler":19}],48:[function(require,module,exports){
 var iota = require("iota-array")
 var isBuffer = require("is-buffer")
 
@@ -22930,7 +22752,7 @@ function wrappedNDArrayCtor(data, shape, stride, offset) {
 
 module.exports = wrappedNDArrayCtor
 
-},{"iota-array":41,"is-buffer":42}],52:[function(require,module,exports){
+},{"iota-array":38,"is-buffer":39}],49:[function(require,module,exports){
 // (c) Dean McNamee <dean@gmail.com>, 2013.
 //
 // https://github.com/deanm/omggif
@@ -23714,7 +23536,7 @@ function GifReaderLZWOutputIndexStream(code_stream, p, output, output_length) {
 
 try { exports.GifWriter = GifWriter; exports.GifReader = GifReader } catch(e) { }  // CommonJS.
 
-},{}],53:[function(require,module,exports){
+},{}],50:[function(require,module,exports){
 'use strict';
 
 
@@ -23818,7 +23640,7 @@ exports.setTyped = function (on) {
 
 exports.setTyped(TYPED_OK);
 
-},{}],54:[function(require,module,exports){
+},{}],51:[function(require,module,exports){
 'use strict';
 
 // Note: adler32 takes 12% for level 0 and 2% for level 6.
@@ -23852,7 +23674,7 @@ function adler32(adler, buf, len, pos) {
 
 module.exports = adler32;
 
-},{}],55:[function(require,module,exports){
+},{}],52:[function(require,module,exports){
 'use strict';
 
 
@@ -23904,7 +23726,7 @@ module.exports = {
   //Z_NULL:                 null // Use -1 or null inline, depending on var type
 };
 
-},{}],56:[function(require,module,exports){
+},{}],53:[function(require,module,exports){
 'use strict';
 
 // Note: we can't get significant speed boost here.
@@ -23947,7 +23769,7 @@ function crc32(crc, buf, len, pos) {
 
 module.exports = crc32;
 
-},{}],57:[function(require,module,exports){
+},{}],54:[function(require,module,exports){
 'use strict';
 
 var utils   = require('../utils/common');
@@ -25804,7 +25626,7 @@ exports.deflatePrime = deflatePrime;
 exports.deflateTune = deflateTune;
 */
 
-},{"../utils/common":53,"./adler32":54,"./crc32":56,"./messages":61,"./trees":62}],58:[function(require,module,exports){
+},{"../utils/common":50,"./adler32":51,"./crc32":53,"./messages":58,"./trees":59}],55:[function(require,module,exports){
 'use strict';
 
 // See state defs from inflate.js
@@ -26132,7 +25954,7 @@ module.exports = function inflate_fast(strm, start) {
   return;
 };
 
-},{}],59:[function(require,module,exports){
+},{}],56:[function(require,module,exports){
 'use strict';
 
 
@@ -27672,7 +27494,7 @@ exports.inflateSyncPoint = inflateSyncPoint;
 exports.inflateUndermine = inflateUndermine;
 */
 
-},{"../utils/common":53,"./adler32":54,"./crc32":56,"./inffast":58,"./inftrees":60}],60:[function(require,module,exports){
+},{"../utils/common":50,"./adler32":51,"./crc32":53,"./inffast":55,"./inftrees":57}],57:[function(require,module,exports){
 'use strict';
 
 
@@ -28001,7 +27823,7 @@ module.exports = function inflate_table(type, lens, lens_index, codes, table, ta
   return 0;
 };
 
-},{"../utils/common":53}],61:[function(require,module,exports){
+},{"../utils/common":50}],58:[function(require,module,exports){
 'use strict';
 
 module.exports = {
@@ -28016,7 +27838,7 @@ module.exports = {
   '-6':   'incompatible version' /* Z_VERSION_ERROR (-6) */
 };
 
-},{}],62:[function(require,module,exports){
+},{}],59:[function(require,module,exports){
 'use strict';
 
 
@@ -29220,7 +29042,7 @@ exports._tr_flush_block  = _tr_flush_block;
 exports._tr_tally = _tr_tally;
 exports._tr_align = _tr_align;
 
-},{"../utils/common":53}],63:[function(require,module,exports){
+},{"../utils/common":50}],60:[function(require,module,exports){
 'use strict';
 
 
@@ -29251,7 +29073,7 @@ function ZStream() {
 
 module.exports = ZStream;
 
-},{}],64:[function(require,module,exports){
+},{}],61:[function(require,module,exports){
 (function (process){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -29479,7 +29301,7 @@ var substr = 'ab'.substr(-1) === 'b'
 ;
 
 }).call(this,require('_process'))
-},{"_process":87}],65:[function(require,module,exports){
+},{"_process":84}],62:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -29675,7 +29497,7 @@ exports.dataToBitMap = function(data, bitmapInfo) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./interlace":75,"buffer":10}],66:[function(require,module,exports){
+},{"./interlace":72,"buffer":7}],63:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -29743,7 +29565,7 @@ module.exports = function(data, width, height, options) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./constants":68,"buffer":10}],67:[function(require,module,exports){
+},{"./constants":65,"buffer":7}],64:[function(require,module,exports){
 (function (process,Buffer){
 'use strict';
 
@@ -29956,7 +29778,7 @@ ChunkStream.prototype._process = function() {
 };
 
 }).call(this,require('_process'),require("buffer").Buffer)
-},{"_process":87,"buffer":10,"stream":106,"util":114}],68:[function(require,module,exports){
+},{"_process":84,"buffer":7,"stream":103,"util":111}],65:[function(require,module,exports){
 'use strict';
 
 
@@ -29992,7 +29814,7 @@ module.exports = {
   GAMMA_DIVISION: 100000
 };
 
-},{}],69:[function(require,module,exports){
+},{}],66:[function(require,module,exports){
 'use strict';
 
 var crcTable = [];
@@ -30038,7 +29860,7 @@ CrcCalculator.crc32 = function(buf) {
   return crc ^ -1;
 };
 
-},{}],70:[function(require,module,exports){
+},{}],67:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30225,7 +30047,7 @@ module.exports = function(pxData, width, height, options, bpp) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./paeth-predictor":79,"buffer":10}],71:[function(require,module,exports){
+},{"./paeth-predictor":76,"buffer":7}],68:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30254,7 +30076,7 @@ var FilterAsync = module.exports = function(bitmapInfo) {
 util.inherits(FilterAsync, ChunkStream);
 
 }).call(this,require("buffer").Buffer)
-},{"./chunkstream":67,"./filter-parse":73,"buffer":10,"util":114}],72:[function(require,module,exports){
+},{"./chunkstream":64,"./filter-parse":70,"buffer":7,"util":111}],69:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30281,7 +30103,7 @@ exports.process = function(inBuffer, bitmapInfo) {
   return Buffer.concat(outBuffers);
 };
 }).call(this,require("buffer").Buffer)
-},{"./filter-parse":73,"./sync-reader":85,"buffer":10}],73:[function(require,module,exports){
+},{"./filter-parse":70,"./sync-reader":82,"buffer":7}],70:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30456,7 +30278,7 @@ Filter.prototype._reverseFilterLine = function(rawData) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./interlace":75,"./paeth-predictor":79,"buffer":10}],74:[function(require,module,exports){
+},{"./interlace":72,"./paeth-predictor":76,"buffer":7}],71:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30549,7 +30371,7 @@ module.exports = function(indata, imageData) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10}],75:[function(require,module,exports){
+},{"buffer":7}],72:[function(require,module,exports){
 'use strict';
 
 // Adam 7
@@ -30637,7 +30459,7 @@ exports.getInterlaceIterator = function(width) {
     return (outerX * 4) + (outerY * width * 4);
   };
 };
-},{}],76:[function(require,module,exports){
+},{}],73:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30686,7 +30508,7 @@ PackerAsync.prototype.pack = function(data, width, height, gamma) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./constants":68,"./packer":78,"buffer":10,"stream":106,"util":114}],77:[function(require,module,exports){
+},{"./constants":65,"./packer":75,"buffer":7,"stream":103,"util":111}],74:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30738,7 +30560,7 @@ module.exports = function(metaData, opt) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./constants":68,"./packer":78,"buffer":10,"zlib":8}],78:[function(require,module,exports){
+},{"./constants":65,"./packer":75,"buffer":7,"zlib":5}],75:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -30833,7 +30655,7 @@ Packer.prototype.packIEND = function() {
   return this._packChunk(constants.TYPE_IEND, null);
 };
 }).call(this,require("buffer").Buffer)
-},{"./bitpacker":66,"./constants":68,"./crc":69,"./filter-pack":70,"buffer":10,"zlib":8}],79:[function(require,module,exports){
+},{"./bitpacker":63,"./constants":65,"./crc":66,"./filter-pack":67,"buffer":7,"zlib":5}],76:[function(require,module,exports){
 'use strict';
 
 module.exports = function paethPredictor(left, above, upLeft) {
@@ -30851,7 +30673,7 @@ module.exports = function paethPredictor(left, above, upLeft) {
   }
   return upLeft;
 };
-},{}],80:[function(require,module,exports){
+},{}],77:[function(require,module,exports){
 'use strict';
 
 var util = require('util');
@@ -30963,7 +30785,7 @@ ParserAsync.prototype._complete = function(filteredData) {
   this.emit('parsed', normalisedBitmapData);
 };
 
-},{"./bitmapper":65,"./chunkstream":67,"./filter-parse-async":71,"./format-normaliser":74,"./parser":82,"util":114,"zlib":8}],81:[function(require,module,exports){
+},{"./bitmapper":62,"./chunkstream":64,"./filter-parse-async":68,"./format-normaliser":71,"./parser":79,"util":111,"zlib":5}],78:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -31058,7 +30880,7 @@ module.exports = function(buffer, options) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./bitmapper":65,"./filter-parse-sync":72,"./format-normaliser":74,"./parser":82,"./sync-reader":85,"buffer":10,"zlib":8}],82:[function(require,module,exports){
+},{"./bitmapper":62,"./filter-parse-sync":69,"./format-normaliser":71,"./parser":79,"./sync-reader":82,"buffer":7,"zlib":5}],79:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -31352,7 +31174,7 @@ Parser.prototype._parseIEND = function(data) {
 };
 
 }).call(this,require("buffer").Buffer)
-},{"./constants":68,"./crc":69,"buffer":10}],83:[function(require,module,exports){
+},{"./constants":65,"./crc":66,"buffer":7}],80:[function(require,module,exports){
 'use strict';
 
 
@@ -31370,7 +31192,7 @@ exports.write = function(png) {
   return pack(png);
 };
 
-},{"./packer-sync":77,"./parser-sync":81}],84:[function(require,module,exports){
+},{"./packer-sync":74,"./parser-sync":78}],81:[function(require,module,exports){
 (function (process,Buffer){
 'use strict';
 
@@ -31537,7 +31359,7 @@ PNG.prototype.adjustGamma = function() {
 };
 
 }).call(this,require('_process'),require("buffer").Buffer)
-},{"./packer-async":76,"./parser-async":80,"./png-sync":83,"_process":87,"buffer":10,"stream":106,"util":114}],85:[function(require,module,exports){
+},{"./packer-async":73,"./parser-async":77,"./png-sync":80,"_process":84,"buffer":7,"stream":103,"util":111}],82:[function(require,module,exports){
 'use strict';
 
 var SyncReader = module.exports = function(buffer) {
@@ -31590,7 +31412,7 @@ SyncReader.prototype.process = function() {
 
 };
 
-},{}],86:[function(require,module,exports){
+},{}],83:[function(require,module,exports){
 (function (process){
 'use strict';
 
@@ -31637,7 +31459,7 @@ function nextTick(fn, arg1, arg2, arg3) {
 }
 
 }).call(this,require('_process'))
-},{"_process":87}],87:[function(require,module,exports){
+},{"_process":84}],84:[function(require,module,exports){
 // shim for using process in browser
 var process = module.exports = {};
 
@@ -31823,10 +31645,10 @@ process.chdir = function (dir) {
 };
 process.umask = function() { return 0; };
 
-},{}],88:[function(require,module,exports){
+},{}],85:[function(require,module,exports){
 module.exports = require('./lib/_stream_duplex.js');
 
-},{"./lib/_stream_duplex.js":89}],89:[function(require,module,exports){
+},{"./lib/_stream_duplex.js":86}],86:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -31951,7 +31773,7 @@ function forEach(xs, f) {
     f(xs[i], i);
   }
 }
-},{"./_stream_readable":91,"./_stream_writable":93,"core-util-is":21,"inherits":40,"process-nextick-args":86}],90:[function(require,module,exports){
+},{"./_stream_readable":88,"./_stream_writable":90,"core-util-is":18,"inherits":37,"process-nextick-args":83}],87:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -31999,7 +31821,7 @@ function PassThrough(options) {
 PassThrough.prototype._transform = function (chunk, encoding, cb) {
   cb(null, chunk);
 };
-},{"./_stream_transform":92,"core-util-is":21,"inherits":40}],91:[function(require,module,exports){
+},{"./_stream_transform":89,"core-util-is":18,"inherits":37}],88:[function(require,module,exports){
 (function (process,global){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -33009,7 +32831,7 @@ function indexOf(xs, x) {
   return -1;
 }
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./_stream_duplex":89,"./internal/streams/BufferList":94,"./internal/streams/destroy":95,"./internal/streams/stream":96,"_process":87,"core-util-is":21,"events":26,"inherits":40,"isarray":43,"process-nextick-args":86,"safe-buffer":101,"string_decoder/":107,"util":6}],92:[function(require,module,exports){
+},{"./_stream_duplex":86,"./internal/streams/BufferList":91,"./internal/streams/destroy":92,"./internal/streams/stream":93,"_process":84,"core-util-is":18,"events":23,"inherits":37,"isarray":40,"process-nextick-args":83,"safe-buffer":98,"string_decoder/":104,"util":3}],89:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -33224,7 +33046,7 @@ function done(stream, er, data) {
 
   return stream.push(null);
 }
-},{"./_stream_duplex":89,"core-util-is":21,"inherits":40}],93:[function(require,module,exports){
+},{"./_stream_duplex":86,"core-util-is":18,"inherits":37}],90:[function(require,module,exports){
 (function (process,global){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -33891,7 +33713,7 @@ Writable.prototype._destroy = function (err, cb) {
   cb(err);
 };
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./_stream_duplex":89,"./internal/streams/destroy":95,"./internal/streams/stream":96,"_process":87,"core-util-is":21,"inherits":40,"process-nextick-args":86,"safe-buffer":101,"util-deprecate":111}],94:[function(require,module,exports){
+},{"./_stream_duplex":86,"./internal/streams/destroy":92,"./internal/streams/stream":93,"_process":84,"core-util-is":18,"inherits":37,"process-nextick-args":83,"safe-buffer":98,"util-deprecate":108}],91:[function(require,module,exports){
 'use strict';
 
 /*<replacement>*/
@@ -33966,7 +33788,7 @@ module.exports = function () {
 
   return BufferList;
 }();
-},{"safe-buffer":101}],95:[function(require,module,exports){
+},{"safe-buffer":98}],92:[function(require,module,exports){
 'use strict';
 
 /*<replacement>*/
@@ -34039,13 +33861,13 @@ module.exports = {
   destroy: destroy,
   undestroy: undestroy
 };
-},{"process-nextick-args":86}],96:[function(require,module,exports){
+},{"process-nextick-args":83}],93:[function(require,module,exports){
 module.exports = require('events').EventEmitter;
 
-},{"events":26}],97:[function(require,module,exports){
+},{"events":23}],94:[function(require,module,exports){
 module.exports = require('./readable').PassThrough
 
-},{"./readable":98}],98:[function(require,module,exports){
+},{"./readable":95}],95:[function(require,module,exports){
 exports = module.exports = require('./lib/_stream_readable.js');
 exports.Stream = exports;
 exports.Readable = exports;
@@ -34054,13 +33876,13 @@ exports.Duplex = require('./lib/_stream_duplex.js');
 exports.Transform = require('./lib/_stream_transform.js');
 exports.PassThrough = require('./lib/_stream_passthrough.js');
 
-},{"./lib/_stream_duplex.js":89,"./lib/_stream_passthrough.js":90,"./lib/_stream_readable.js":91,"./lib/_stream_transform.js":92,"./lib/_stream_writable.js":93}],99:[function(require,module,exports){
+},{"./lib/_stream_duplex.js":86,"./lib/_stream_passthrough.js":87,"./lib/_stream_readable.js":88,"./lib/_stream_transform.js":89,"./lib/_stream_writable.js":90}],96:[function(require,module,exports){
 module.exports = require('./readable').Transform
 
-},{"./readable":98}],100:[function(require,module,exports){
+},{"./readable":95}],97:[function(require,module,exports){
 module.exports = require('./lib/_stream_writable.js');
 
-},{"./lib/_stream_writable.js":93}],101:[function(require,module,exports){
+},{"./lib/_stream_writable.js":90}],98:[function(require,module,exports){
 /* eslint-disable node/no-deprecated-api */
 var buffer = require('buffer')
 var Buffer = buffer.Buffer
@@ -34124,7 +33946,7 @@ SafeBuffer.allocUnsafeSlow = function (size) {
   return buffer.SlowBuffer(size)
 }
 
-},{"buffer":10}],102:[function(require,module,exports){
+},{"buffer":7}],99:[function(require,module,exports){
 var encode = require('./lib/encoder'),
     decode = require('./lib/decoder');
 
@@ -34133,7 +33955,7 @@ module.exports = {
   decode: decode
 };
 
-},{"./lib/decoder":103,"./lib/encoder":104}],103:[function(require,module,exports){
+},{"./lib/decoder":100,"./lib/encoder":101}],100:[function(require,module,exports){
 (function (Buffer){
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
@@ -35116,7 +34938,7 @@ function decode(jpegData) {
 }
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10}],104:[function(require,module,exports){
+},{"buffer":7}],101:[function(require,module,exports){
 (function (Buffer){
 /*
   Copyright (c) 2008, Adobe Systems Incorporated
@@ -35886,7 +35708,7 @@ function getImageDataFromImage(idOrElement){
 }
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10}],105:[function(require,module,exports){
+},{"buffer":7}],102:[function(require,module,exports){
 (function (Buffer){
 'use strict'
 
@@ -36031,7 +35853,7 @@ module.exports = function savePixels (array, type, options) {
 }
 
 }).call(this,require("buffer").Buffer)
-},{"buffer":10,"contentstream":12,"gif-encoder":28,"jpeg-js":102,"ndarray":51,"ndarray-ops":48,"pngjs-nozlib":84,"through":108}],106:[function(require,module,exports){
+},{"buffer":7,"contentstream":9,"gif-encoder":25,"jpeg-js":99,"ndarray":48,"ndarray-ops":45,"pngjs-nozlib":81,"through":105}],103:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -36160,7 +35982,7 @@ Stream.prototype.pipe = function(dest, options) {
   return dest;
 };
 
-},{"events":26,"inherits":40,"readable-stream/duplex.js":88,"readable-stream/passthrough.js":97,"readable-stream/readable.js":98,"readable-stream/transform.js":99,"readable-stream/writable.js":100}],107:[function(require,module,exports){
+},{"events":23,"inherits":37,"readable-stream/duplex.js":85,"readable-stream/passthrough.js":94,"readable-stream/readable.js":95,"readable-stream/transform.js":96,"readable-stream/writable.js":97}],104:[function(require,module,exports){
 'use strict';
 
 var Buffer = require('safe-buffer').Buffer;
@@ -36433,7 +36255,7 @@ function simpleWrite(buf) {
 function simpleEnd(buf) {
   return buf && buf.length ? this.write(buf) : '';
 }
-},{"safe-buffer":101}],108:[function(require,module,exports){
+},{"safe-buffer":98}],105:[function(require,module,exports){
 (function (process){
 var Stream = require('stream')
 
@@ -36545,7 +36367,7 @@ function through (write, end, opts) {
 
 
 }).call(this,require('_process'))
-},{"_process":87,"stream":106}],109:[function(require,module,exports){
+},{"_process":84,"stream":103}],106:[function(require,module,exports){
 "use strict"
 
 function unique_pred(list, compare) {
@@ -36604,7 +36426,7 @@ function unique(list, compare, sorted) {
 
 module.exports = unique
 
-},{}],110:[function(require,module,exports){
+},{}],107:[function(require,module,exports){
 var mime = require('mime');
 var fs = require('fs');
 
@@ -36614,7 +36436,7 @@ module.exports = function urifyNode (file) {
   return 'data:' + type + ';base64,' + data;
 };
 
-},{"fs":9,"mime":46}],111:[function(require,module,exports){
+},{"fs":6,"mime":43}],108:[function(require,module,exports){
 (function (global){
 
 /**
@@ -36685,16 +36507,16 @@ function config (name) {
 }
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],112:[function(require,module,exports){
-arguments[4][40][0].apply(exports,arguments)
-},{"dup":40}],113:[function(require,module,exports){
+},{}],109:[function(require,module,exports){
+arguments[4][37][0].apply(exports,arguments)
+},{"dup":37}],110:[function(require,module,exports){
 module.exports = function isBuffer(arg) {
   return arg && typeof arg === 'object'
     && typeof arg.copy === 'function'
     && typeof arg.fill === 'function'
     && typeof arg.readUInt8 === 'function';
 }
-},{}],114:[function(require,module,exports){
+},{}],111:[function(require,module,exports){
 (function (process,global){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -37284,34 +37106,25 @@ function hasOwnProperty(obj, prop) {
 }
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./support/isBuffer":113,"_process":87,"inherits":112}],115:[function(require,module,exports){
+},{"./support/isBuffer":110,"_process":84,"inherits":109}],112:[function(require,module,exports){
 function AddStep(ref, image, name, o) {
 
   function addStep(image, name, o_) {
-    ref.log('\x1b[36m%s\x1b[0m','adding step \"' + name + '\" to \"' + image + '\".');
-
     var o = ref.copy(o_);
-    o.id = ref.options.sequencerCounter++; //Gives a Unique ID to each step
+    o.number = ref.options.sequencerCounter++; //Gives a Unique ID to each step
     o.name = o_.name || name;
     o.selector = o_.selector || 'ismod-' + name;
     o.container = o_.container || ref.options.selector;
     o.image = image;
 
-    var module = ref.modules[name].call(ref.images,o);
+    var UI = ref.UI({
+      stepName: o.name,
+      stepID: o.number,
+      imageName: o.image
+    });
+    var module = ref.modules[name](o,UI);
     ref.images[image].steps.push(module);
 
-
-    function defaultSetupModule() {
-      if (ref.options.ui && ref.options.ui!="none") module.options.ui = ref.options.ui({
-        selector: o.selector,
-        title: module.options.title,
-        id: o.id
-      });
-    }
-    if (module.hasOwnProperty('setup')) module.setup(); // add a default UI, unless the module has one specified
-    else defaultSetupModule.apply(module); // run default setup() in scope of module (is this right?)
-
-    // tell the UI that a step has been added.
     return true;
   }
 
@@ -37319,7 +37132,7 @@ function AddStep(ref, image, name, o) {
 }
 module.exports = AddStep;
 
-},{}],116:[function(require,module,exports){
+},{}],113:[function(require,module,exports){
 function objTypeOf(object){
   return Object.prototype.toString.call(object).split(" ")[1].slice(0,-1)
 }
@@ -37485,7 +37298,7 @@ function formatInput(args,format,images) {
 }
 module.exports = formatInput;
 
-},{}],117:[function(require,module,exports){
+},{}],114:[function(require,module,exports){
 if (typeof window !== 'undefined') {window.$ = window.jQuery = require('jquery'); isBrowser = true}
 else {var isBrowser = false}
 
@@ -37529,7 +37342,10 @@ ImageSequencer = function ImageSequencer(options) {
       modules = require('./Modules'),
       formatInput = require('./FormatInput'),
       images = {},
-      inputlog = [];
+      inputlog = [],
+      UI;
+
+  setUI();
 
   // if in browser, prompt for an image
   // if (options.imageSelect || options.inBrowser) addStep('image-select');
@@ -37554,7 +37370,7 @@ ImageSequencer = function ImageSequencer(options) {
   function removeStep(image,index) {
     //remove the step from images[image].steps and redraw remaining images
     if(index>0) {
-      log('\x1b[31m%s\x1b[0m',"Removing "+index+" from "+image);
+      images[image].steps[index].UI.onRemove();
       images[image].steps.splice(index,1);
     }
     //tell the UI a step has been removed
@@ -37600,7 +37416,6 @@ ImageSequencer = function ImageSequencer(options) {
   }
 
   function run(t_image,t_from) {
-    log('\x1b[32m%s\x1b[0m',"Running the Sequencer!");
     const this_ = (this.name == "ImageSequencer")?this:this.sequencer;
     var args = (this.name == "ImageSequencer")?[]:[this.images];
     for (var arg in arguments) args.push(copy(arguments[arg]));
@@ -37636,6 +37451,8 @@ ImageSequencer = function ImageSequencer(options) {
       removeSteps: this.removeSteps,
       insertSteps: this.insertSteps,
       run: this.run,
+      UI: this.UI,
+      setUI: this.setUI,
       images: loadedimages
     };
   }
@@ -37645,9 +37462,21 @@ ImageSequencer = function ImageSequencer(options) {
     return require('./ReplaceImage')(this,selector,steps);
   }
 
+  function setUI(_UI) {
+    UI = require('./UserInterface')(_UI,options);
+    return UI;
+  }
+
   return {
+    //literals and objects
     name: "ImageSequencer",
     options: options,
+    inputlog: inputlog,
+    modules: modules,
+    images: images,
+    UI: UI,
+
+    //user functions
     loadImages: loadImages,
     loadImage: loadImages,
     addSteps: addSteps,
@@ -37655,10 +37484,9 @@ ImageSequencer = function ImageSequencer(options) {
     insertSteps: insertSteps,
     replaceImage: replaceImage,
     run: run,
-    inputlog: inputlog,
-    modules: modules,
-    images: images,
-    ui: options.ui,
+    setUI: setUI,
+
+    //other functions
     log: log,
     objTypeOf: objTypeOf,
     copy: copy
@@ -37667,35 +37495,26 @@ ImageSequencer = function ImageSequencer(options) {
 }
 module.exports = ImageSequencer;
 
-},{"./AddStep":115,"./FormatInput":116,"./InsertStep":118,"./LoadImage":119,"./Modules":120,"./ReplaceImage":121,"./Run":122,"jquery":44}],118:[function(require,module,exports){
+},{"./AddStep":112,"./FormatInput":113,"./InsertStep":115,"./LoadImage":116,"./Modules":117,"./ReplaceImage":118,"./Run":119,"./UserInterface":120,"jquery":41}],115:[function(require,module,exports){
 function InsertStep(ref, image, index, name, o) {
 
   function insertStep(image, index, name, o_) {
-    ref.log('\x1b[36m%s\x1b[0m','inserting step \"' + name + '\" to \"' + image + '\" at \"'+index+'\".');
-
     var o = ref.copy(o_);
-    o.id = ref.options.sequencerCounter++; //Gives a Unique ID to each step
-    o.name = o.name || name;
-    o.selector = o.selector || 'ismod-' + name;
-    o.container = o.container || ref.options.selector;
+    o.number = ref.options.sequencerCounter++; //Gives a Unique ID to each step
+    o.name = o_.name || name;
+    o.selector = o_.selector || 'ismod-' + name;
+    o.container = o_.container || ref.options.selector;
     o.image = image;
 
     if(index==-1) index = ref.images[image].steps.length;
 
-    var module = ref.modules[name](o);
-    ref.images[image].steps.splice(index, 0, module);
-
-    function defaultSetupModule() {
-      if (ref.options.ui && ref.options.ui!="none") module.options.ui = ref.options.ui({
-        selector: o.selector,
-        title: module.options.title,
-        id: o.id
-      });
-    }
-    if (module.hasOwnProperty('setup')) module.setup(); // add a default UI, unless the module has one specified
-    else defaultSetupModule.apply(module); // run default setup() in scope of module (is this right?)
-
-    // tell the UI that a step has been inserted.
+    var UI = ref.UI({
+      stepName: o.name,
+      stepID: o.number,
+      imageName: o.image
+    });
+    var module = ref.modules[name](o,UI);
+    ref.images[image].steps.splice(index,0,module);
 
     return true;
   }
@@ -37704,7 +37523,7 @@ function InsertStep(ref, image, index, name, o) {
 }
 module.exports = InsertStep;
 
-},{}],119:[function(require,module,exports){
+},{}],116:[function(require,module,exports){
 function LoadImage(ref, name, src) {
   function CImage(src) {
     var datauri = (ref.options.inBrowser || src.substring(0,11) == "data:image/")?(src):require('urify')(src);
@@ -37724,6 +37543,11 @@ function LoadImage(ref, name, src) {
           name: "load-image",
           title: "Load Image"
         },
+        UI: ref.UI({
+          stepName: "load-image",
+          stepID: ref.options.sequencerCounter++,
+          imageName: name
+        }),
         draw: function() {
           if(arguments.length==1){
             this.output = CImage(arguments[0]);
@@ -37740,6 +37564,9 @@ function LoadImage(ref, name, src) {
       }]
     };
     ref.images[name] = image;
+    ref.images[name].steps[0].UI.onSetup();
+    ref.images[name].steps[0].UI.onDraw();
+    ref.images[name].steps[0].UI.onComplete(image.steps[0].output.src);
   }
 
   return loadImage(name,src);
@@ -37747,7 +37574,7 @@ function LoadImage(ref, name, src) {
 
 module.exports = LoadImage;
 
-},{"urify":110}],120:[function(require,module,exports){
+},{"urify":107}],117:[function(require,module,exports){
 /*
  * Core modules
  */
@@ -37762,7 +37589,7 @@ module.exports = {
   'decode-qr': require('./modules/DecodeQr/Module')
 }
 
-},{"./modules/Crop/Module":124,"./modules/DecodeQr/Module":125,"./modules/DoNothing/Module":126,"./modules/DoNothingPix/Module.js":127,"./modules/GreenChannel/Module":128,"./modules/Invert/Module":129,"./modules/NdviRed/Module":130,"./modules/SegmentedColormap/Module":131}],121:[function(require,module,exports){
+},{"./modules/Crop/Module":122,"./modules/DecodeQr/Module":123,"./modules/DoNothing/Module":124,"./modules/DoNothingPix/Module.js":125,"./modules/GreenChannel/Module":126,"./modules/Invert/Module":127,"./modules/NdviRed/Module":128,"./modules/SegmentedColormap/Module":129}],118:[function(require,module,exports){
 function ReplaceImage(ref,selector,steps,options) {
   if(!ref.options.inBrowser) return false; // This isn't for Node.js
   var this_ = ref;
@@ -37799,7 +37626,7 @@ function ReplaceImage(ref,selector,steps,options) {
 
 module.exports = ReplaceImage;
 
-},{}],122:[function(require,module,exports){
+},{}],119:[function(require,module,exports){
 function Run(ref, json_q, callback) {
   function drawStep(drawarray,pos) {
     if(pos==drawarray.length) {
@@ -37848,21 +37675,94 @@ function Run(ref, json_q, callback) {
 }
 module.exports = Run;
 
-},{}],123:[function(require,module,exports){
+},{}],120:[function(require,module,exports){
+/*
+ * Default UI for each image-sequencer module
+ */
+module.exports = function UserInterface(UI,options) {
+
+  return function userInterface(identity) {
+
+    var UI = UI || {};
+
+    UI.onSetup = UI.onSetup || function() {
+      if(options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Create and append an HTML Element
+        console.log("Added Step \""+identity.stepName+"\" to \""+identity.imageName+"\".");
+      }
+      else {
+        // Create a NodeJS Object
+        console.log('\x1b[36m%s\x1b[0m',"Added Step \""+identity.stepName+"\" to \""+identity.imageName+"\".");
+
+      }
+    }
+
+    UI.onDraw = UI.onDraw || function() {
+      if (options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Overlay a loading spinner
+        console.log("Drawing Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+      else {
+        // Don't do anything
+        console.log('\x1b[33m%s\x1b[0m',"Drawing Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+    }
+
+    UI.onComplete = UI.onComplete || function(output) {
+      if (options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Update the DIV Element
+        // Hide the laoding spinner
+        console.log("Drawn Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+      else {
+        // Update the NodeJS Object
+        console.log('\x1b[32m%s\x1b[0m',"Drawn Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+    }
+
+    UI.onRemove = UI.onRemove || function(callback) {
+      if(options.ui == false){
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Remove the DIV Element
+        console.log("Removing Step \""+identity.stepName+"\" of \""+identity.imageName+"\".");
+      }
+      else {
+        // Delete the NodeJS Object
+        console.log('\x1b[31m%s\x1b[0m',"Removing Step \""+identity.stepName+"\" of \""+identity.imageName+"\".");
+      }
+    }
+
+    return UI;
+
+  }
+
+}
+
+},{}],121:[function(require,module,exports){
+(function (Buffer){
 module.exports = function Crop(input,options,callback) {
 
-  var getPixels = require("get-pixels"),
-      savePixels = require("save-pixels"),
-      base64 = require('base64-stream');
+  var getPixels = require('get-pixels'),
+      savePixels = require('save-pixels');
 
   getPixels(input.src,function(err,pixels){
-    var newdata = [];
     var ox = options.x || 0;
     var oy = options.y || 0;
     var w = options.w || Math.floor(0.5*pixels.shape[0]);
     var h = options.h || Math.floor(0.5*pixels.shape[1]);
     var iw = pixels.shape[0]; //Width of Original Image
-    newarray = new Uint8Array(4*w*h);
+    var newarray = new Uint8Array(4*w*h);
     for (var n = oy; n < oy + h; n++) {
       newarray.set(pixels.data.slice(n*4*iw + ox, n*4*iw + ox + 4*w),4*w*(n-oy));
     }
@@ -37870,20 +37770,27 @@ module.exports = function Crop(input,options,callback) {
     pixels.shape = [w,h,4];
     pixels.stride[1] = 4*w;
 
-    options.format = "jpeg";
+    options.format = input.format;
 
-    w = base64.encode();
+    var chunks = [];
+    var totalLength = 0;
     var r = savePixels(pixels, options.format);
-    r.pipe(w).on('finish',function(){
-      data = w.read().toString();
-      datauri = 'data:image/' + options.format + ';base64,' + data;
+
+    r.on('data', function(chunk){
+      totalLength += chunk.length;
+      chunks.push(chunk);
+    });
+
+    r.on('end', function(){
+      var data = Buffer.concat(chunks, totalLength).toString('base64');
+      var datauri = 'data:image/' + options.format + ';base64,' + data;
       callback(datauri,options.format);
     });
   });
+};
 
-}
-
-},{"base64-stream":3,"get-pixels":27,"save-pixels":105}],124:[function(require,module,exports){
+}).call(this,require("buffer").Buffer)
+},{"buffer":7,"get-pixels":24,"save-pixels":102}],122:[function(require,module,exports){
 /*
  * Image Cropping module
  * Usage:
@@ -37899,21 +37806,23 @@ module.exports = function Crop(input,options,callback) {
  *          y = options.y
  *          y = options.y + options.h
  */
- module.exports = function CropModule(options) {
+ module.exports = function CropModule(options,UI) {
    options = options || {};
    options.title = "Crop Image";
-   var this_ = this;
+   UI.onSetup();
    var output
 
    function draw(input,callback) {
 
-     const this_ = this;
+     UI.onDraw();
+     const step = this;
 
      require('./Crop')(input,options,function(out,format){
-       this_.output = {
+       step.output = {
          src: out,
          format: format
        }
+       UI.onComplete(out);
        callback();
      });
 
@@ -37923,31 +37832,37 @@ module.exports = function Crop(input,options,callback) {
    return {
      options: options,
      draw: draw,
-     output: output
+     output: output,
+     UI: UI
    }
  }
 
-},{"./Crop":123}],125:[function(require,module,exports){
+},{"./Crop":121}],123:[function(require,module,exports){
 /*
  * Decodes QR from a given image.
  */
-module.exports = function DoNothing(options) {
+module.exports = function DoNothing(options,UI) {
   options = options || {};
   options.title = "Decode QR Code";
+  UI.onSetup();
   var output;
   var jsQR = require('jsqr');
   var getPixels = require('get-pixels');
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+
+    const step = this;
     getPixels(input.src,function(err,pixels){
       if(err) throw err;
       var w = pixels.shape[0];
       var h = pixels.shape[1];
       var decoded = jsQR.decodeQRFromImage(pixels.data,w,h);
-      this_.output = input;
-      this_.output.data = decoded;
+      step.output = input;
+      step.output.data = decoded;
       callback();
+      UI.onComplete(input.src);
     });
   }
 
@@ -37958,45 +37873,53 @@ module.exports = function DoNothing(options) {
   }
 }
 
-},{"get-pixels":27,"jsqr":45}],126:[function(require,module,exports){
+},{"get-pixels":24,"jsqr":42}],124:[function(require,module,exports){
 /*
  * Demo Module. Does nothing. Adds a step where output is equal to input.
  */
-module.exports = function DoNothing(options) {
+module.exports = function DoNothing(options,UI) {
   options = options || {};
   options.title = "Do Nothing";
-  var this_ = this;
-  var output
+  UI.onSetup();
+  var output;
 
   function draw(input,callback) {
+    UI.onDraw();
     this.output = input;
     callback();
+    UI.onComplete(this.output.src);
   }
 
   return {
     options: options,
     draw: draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
 
-},{}],127:[function(require,module,exports){
+},{}],125:[function(require,module,exports){
 /*
  * This module extracts pixels and saves them as it is.
  */
-module.exports = function DoNothingPix(options) {
+module.exports = function DoNothingPix(options,UI) {
 
   options = options || {};
   options.title = "Do Nothing with pixels";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [r, g, b, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype}
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -38005,35 +37928,40 @@ module.exports = function DoNothingPix(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
 
-},{"../_nomodule/PixelManipulation.js":133}],128:[function(require,module,exports){
+},{"../_nomodule/PixelManipulation.js":131}],126:[function(require,module,exports){
 /*
  * Display only the green channel
  */
-module.exports = function GreenChannel(options) {
+module.exports = function GreenChannel(options,UI) {
 
   options = options || {};
   options.title = "Green channel only";
   options.description = "Displays only the green channel of an image";
+  UI.onSetup();
   var output;
 
-  //function setup() {} // optional
-
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [0, g, 0, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -38042,36 +37970,43 @@ module.exports = function GreenChannel(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     //setup: setup, // optional
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
 
-},{"../_nomodule/PixelManipulation.js":133}],129:[function(require,module,exports){
+},{"../_nomodule/PixelManipulation.js":131}],127:[function(require,module,exports){
 /*
  * Display only the green channel
  */
-module.exports = function GreenChannel(options) {
+module.exports = function GreenChannel(options,UI) {
 
   options = options || {};
   options.title = "Invert Colors";
   options.description = "Inverts the colors of the image";
+  UI.onSetup();
   var output;
 
   //function setup() {} // optional
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [255-r, 255-g, 255-b, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -38080,35 +38015,42 @@ module.exports = function GreenChannel(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     //setup: setup, // optional
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
 
-},{"../_nomodule/PixelManipulation.js":133}],130:[function(require,module,exports){
+},{"../_nomodule/PixelManipulation.js":131}],128:[function(require,module,exports){
 /*
  * NDVI with red filter (blue channel is infrared)
  */
-module.exports = function NdviRed(options) {
+module.exports = function NdviRed(options,UI) {
 
   options = options || {};
   options.title = "NDVI for red-filtered cameras (blue is infrared)";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       var ndvi = (b - r) / (1.00 * b + r);
       var x = 255 * (ndvi + 1) / 2;
       return [x, x, x, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -38117,23 +38059,30 @@ module.exports = function NdviRed(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
-    draw: draw
+    draw: draw,
+    output: output,
+    UI:UI
   }
 }
 
-},{"../_nomodule/PixelManipulation.js":133}],131:[function(require,module,exports){
-module.exports = function SegmentedColormap(options) {
+},{"../_nomodule/PixelManipulation.js":131}],129:[function(require,module,exports){
+module.exports = function SegmentedColormap(options,UI) {
 
   options = options || {};
   options.title = "Segmented Colormap";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       var ndvi = (b - r) / (r + b);
       var normalized = (ndvi + 1) / 2;
@@ -38141,7 +38090,8 @@ module.exports = function SegmentedColormap(options) {
       return [res[0], res[1], res[2], 255];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -38150,16 +38100,18 @@ module.exports = function SegmentedColormap(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     draw: draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
 
-},{"../_nomodule/PixelManipulation.js":133,"./SegmentedColormap":132}],132:[function(require,module,exports){
+},{"../_nomodule/PixelManipulation.js":131,"./SegmentedColormap":130}],130:[function(require,module,exports){
 /*
  * Accepts a normalized ndvi and returns the new color-mapped pixel
  */
@@ -38218,7 +38170,8 @@ var colormaps = {
   fastie: fastie_colormap
 }
 
-},{}],133:[function(require,module,exports){
+},{}],131:[function(require,module,exports){
+(function (Buffer){
 /*
  * General purpose per-pixel manipulation
  * accepting a changePixel() method to remix a pixel's channels
@@ -38228,16 +38181,15 @@ module.exports = function PixelManipulation(image, options) {
   options = options || {};
   options.changePixel = options.changePixel || function changePixel(r, g, b, a) {
     return [r, g, b, a];
-  }
-  var getPixels = require("get-pixels"),
-      savePixels = require("save-pixels"),
-      base64 = require('base64-stream');
+  };
+  var getPixels = require('get-pixels'),
+      savePixels = require('save-pixels');
 
   getPixels(image.src, function(err, pixels) {
 
     if(err) {
-      console.log("Bad image path")
-      return
+      console.log('Bad image path');
+      return;
     }
 
     // iterate through pixels;
@@ -38246,7 +38198,7 @@ module.exports = function PixelManipulation(image, options) {
     for(var x = 0; x < pixels.shape[0]; x++) {
       for(var y = 0; y < pixels.shape[1]; y++) {
 
-        pixel = options.changePixel(
+        var pixel = options.changePixel(
           pixels.get(x, y, 0),
           pixels.get(x, y, 1),
           pixels.get(x, y, 2),
@@ -38261,21 +38213,25 @@ module.exports = function PixelManipulation(image, options) {
       }
     }
 
-    options.format = "jpeg";
-
     // there may be a more efficient means to encode an image object,
     // but node modules and their documentation are essentially arcane on this point
-    w = base64.encode();
+    var chunks = [];
+    var totalLength = 0;
     var r = savePixels(pixels, options.format);
-    r.pipe(w).on('finish',function(){
-      data = w.read().toString();
-      datauri = 'data:image/' + options.format + ';base64,' + data;
+
+    r.on('data', function(chunk){
+      totalLength += chunk.length;
+      chunks.push(chunk);
+    });
+
+    r.on('end', function(){
+      var data = Buffer.concat(chunks, totalLength).toString('base64');
+      var datauri = 'data:image/' + options.format + ';base64,' + data;
       if (options.output) options.output(options.image,datauri,options.format);
       if (options.callback) options.callback();
     });
-
   });
+};
 
-}
-
-},{"base64-stream":3,"get-pixels":27,"save-pixels":105}]},{},[117]);
+}).call(this,require("buffer").Buffer)
+},{"buffer":7,"get-pixels":24,"save-pixels":102}]},{},[114]);
diff --git a/package.json b/package.json
index 5bcff420..b4f7cde0 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,6 @@
     "urify": "^2.1.0"
   },
   "devDependencies": {
-    "base64-stream": "~0.1.3",
     "browserify": "13.0.0",
     "buffer": "~5.0.2",
     "get-pixels": "~3.3.0",
diff --git a/src/AddStep.js b/src/AddStep.js
index e29ab90e..22298c05 100644
--- a/src/AddStep.js
+++ b/src/AddStep.js
@@ -1,30 +1,21 @@
 function AddStep(ref, image, name, o) {
 
   function addStep(image, name, o_) {
-    ref.log('\x1b[36m%s\x1b[0m','adding step \"' + name + '\" to \"' + image + '\".');
-
     var o = ref.copy(o_);
-    o.id = ref.options.sequencerCounter++; //Gives a Unique ID to each step
+    o.number = ref.options.sequencerCounter++; //Gives a Unique ID to each step
     o.name = o_.name || name;
     o.selector = o_.selector || 'ismod-' + name;
     o.container = o_.container || ref.options.selector;
     o.image = image;
 
-    var module = ref.modules[name].call(ref.images,o);
+    var UI = ref.UI({
+      stepName: o.name,
+      stepID: o.number,
+      imageName: o.image
+    });
+    var module = ref.modules[name](o,UI);
     ref.images[image].steps.push(module);
 
-
-    function defaultSetupModule() {
-      if (ref.options.ui && ref.options.ui!="none") module.options.ui = ref.options.ui({
-        selector: o.selector,
-        title: module.options.title,
-        id: o.id
-      });
-    }
-    if (module.hasOwnProperty('setup')) module.setup(); // add a default UI, unless the module has one specified
-    else defaultSetupModule.apply(module); // run default setup() in scope of module (is this right?)
-
-    // tell the UI that a step has been added.
     return true;
   }
 
diff --git a/src/ImageSequencer.js b/src/ImageSequencer.js
index a4d570a5..de1e6e10 100644
--- a/src/ImageSequencer.js
+++ b/src/ImageSequencer.js
@@ -41,7 +41,10 @@ ImageSequencer = function ImageSequencer(options) {
       modules = require('./Modules'),
       formatInput = require('./FormatInput'),
       images = {},
-      inputlog = [];
+      inputlog = [],
+      UI;
+
+  setUI();
 
   // if in browser, prompt for an image
   // if (options.imageSelect || options.inBrowser) addStep('image-select');
@@ -66,7 +69,7 @@ ImageSequencer = function ImageSequencer(options) {
   function removeStep(image,index) {
     //remove the step from images[image].steps and redraw remaining images
     if(index>0) {
-      log('\x1b[31m%s\x1b[0m',"Removing "+index+" from "+image);
+      images[image].steps[index].UI.onRemove();
       images[image].steps.splice(index,1);
     }
     //tell the UI a step has been removed
@@ -112,7 +115,6 @@ ImageSequencer = function ImageSequencer(options) {
   }
 
   function run(t_image,t_from) {
-    log('\x1b[32m%s\x1b[0m',"Running the Sequencer!");
     const this_ = (this.name == "ImageSequencer")?this:this.sequencer;
     var args = (this.name == "ImageSequencer")?[]:[this.images];
     for (var arg in arguments) args.push(copy(arguments[arg]));
@@ -148,6 +150,8 @@ ImageSequencer = function ImageSequencer(options) {
       removeSteps: this.removeSteps,
       insertSteps: this.insertSteps,
       run: this.run,
+      UI: this.UI,
+      setUI: this.setUI,
       images: loadedimages
     };
   }
@@ -157,9 +161,21 @@ ImageSequencer = function ImageSequencer(options) {
     return require('./ReplaceImage')(this,selector,steps);
   }
 
+  function setUI(_UI) {
+    UI = require('./UserInterface')(_UI,options);
+    return UI;
+  }
+
   return {
+    //literals and objects
     name: "ImageSequencer",
     options: options,
+    inputlog: inputlog,
+    modules: modules,
+    images: images,
+    UI: UI,
+
+    //user functions
     loadImages: loadImages,
     loadImage: loadImages,
     addSteps: addSteps,
@@ -167,10 +183,9 @@ ImageSequencer = function ImageSequencer(options) {
     insertSteps: insertSteps,
     replaceImage: replaceImage,
     run: run,
-    inputlog: inputlog,
-    modules: modules,
-    images: images,
-    ui: options.ui,
+    setUI: setUI,
+
+    //other functions
     log: log,
     objTypeOf: objTypeOf,
     copy: copy
diff --git a/src/InsertStep.js b/src/InsertStep.js
index cbab43ab..ece3da01 100644
--- a/src/InsertStep.js
+++ b/src/InsertStep.js
@@ -1,31 +1,22 @@
 function InsertStep(ref, image, index, name, o) {
 
   function insertStep(image, index, name, o_) {
-    ref.log('\x1b[36m%s\x1b[0m','inserting step \"' + name + '\" to \"' + image + '\" at \"'+index+'\".');
-
     var o = ref.copy(o_);
-    o.id = ref.options.sequencerCounter++; //Gives a Unique ID to each step
-    o.name = o.name || name;
-    o.selector = o.selector || 'ismod-' + name;
-    o.container = o.container || ref.options.selector;
+    o.number = ref.options.sequencerCounter++; //Gives a Unique ID to each step
+    o.name = o_.name || name;
+    o.selector = o_.selector || 'ismod-' + name;
+    o.container = o_.container || ref.options.selector;
     o.image = image;
 
     if(index==-1) index = ref.images[image].steps.length;
 
-    var module = ref.modules[name](o);
-    ref.images[image].steps.splice(index, 0, module);
-
-    function defaultSetupModule() {
-      if (ref.options.ui && ref.options.ui!="none") module.options.ui = ref.options.ui({
-        selector: o.selector,
-        title: module.options.title,
-        id: o.id
-      });
-    }
-    if (module.hasOwnProperty('setup')) module.setup(); // add a default UI, unless the module has one specified
-    else defaultSetupModule.apply(module); // run default setup() in scope of module (is this right?)
-
-    // tell the UI that a step has been inserted.
+    var UI = ref.UI({
+      stepName: o.name,
+      stepID: o.number,
+      imageName: o.image
+    });
+    var module = ref.modules[name](o,UI);
+    ref.images[image].steps.splice(index,0,module);
 
     return true;
   }
diff --git a/src/LoadImage.js b/src/LoadImage.js
index cee3e427..d7453b0d 100644
--- a/src/LoadImage.js
+++ b/src/LoadImage.js
@@ -17,6 +17,11 @@ function LoadImage(ref, name, src) {
           name: "load-image",
           title: "Load Image"
         },
+        UI: ref.UI({
+          stepName: "load-image",
+          stepID: ref.options.sequencerCounter++,
+          imageName: name
+        }),
         draw: function() {
           if(arguments.length==1){
             this.output = CImage(arguments[0]);
@@ -33,6 +38,9 @@ function LoadImage(ref, name, src) {
       }]
     };
     ref.images[name] = image;
+    ref.images[name].steps[0].UI.onSetup();
+    ref.images[name].steps[0].UI.onDraw();
+    ref.images[name].steps[0].UI.onComplete(image.steps[0].output.src);
   }
 
   return loadImage(name,src);
diff --git a/src/UserInterface.js b/src/UserInterface.js
index d483ef8f..8ac3623c 100644
--- a/src/UserInterface.js
+++ b/src/UserInterface.js
@@ -1,41 +1,72 @@
 /*
  * Default UI for each image-sequencer module
  */
-module.exports = function UserInterface(options) {
+module.exports = function UserInterface(UI,options) {
 
-  options = options || {};
-  options.container = options.container || ".panels";
-  options.id = options.id;
-  options.instanceName = options.instanceName;
-  options.random = options.random || parseInt(Math.random() * (new Date()).getTime() / 1000000);
-  options.uniqueSelector = options.uniqueSelector || options.selector + '-' + options.random;
-  $(options.container).append('<div class="panel ' + options.selector + ' ' + options.uniqueSelector + '" id="sequencer-'+options.id+'"><div class="image"></div></div>');
-  options.el = options.el || $('.' + options.uniqueSelector);
-  createLabel(options.el);
+  return function userInterface(identity) {
 
-  // method to remove the UI for a given method, and remove the step
-  function display(image) {
-    options.el.find('.image').html(image);
-  }
+    var UI = UI || {};
 
-  // method to remove the UI for a given method, and remove the step
-  function remove() {
-    $('div#sequencer-'+options.id).remove();
-  }
+    UI.onSetup = UI.onSetup || function() {
+      if(options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Create and append an HTML Element
+        console.log("Added Step \""+identity.stepName+"\" to \""+identity.imageName+"\".");
+      }
+      else {
+        // Create a NodeJS Object
+        console.log('\x1b[36m%s\x1b[0m',"Added Step \""+identity.stepName+"\" to \""+identity.imageName+"\".");
 
-  // method to reorder steps, and update the UI
-  //function move() {}
+      }
+    }
 
-  function createLabel(el) {
-    if (options.title) el.prepend('<h3 class="title">' + options.title + '</h3> <button class="btn btn-default" onclick="'+options.instanceName+'.removeStep('+options.id+')">Remove Step</button>');
-  }
+    UI.onDraw = UI.onDraw || function() {
+      if (options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Overlay a loading spinner
+        console.log("Drawing Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+      else {
+        // Don't do anything
+        console.log('\x1b[33m%s\x1b[0m',"Drawing Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+    }
+
+    UI.onComplete = UI.onComplete || function(output) {
+      if (options.ui == false) {
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Update the DIV Element
+        // Hide the laoding spinner
+        console.log("Drawn Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+      else {
+        // Update the NodeJS Object
+        console.log('\x1b[32m%s\x1b[0m',"Drawn Step \""+identity.stepName+"\" on \""+identity.imageName+"\".");
+      }
+    }
+
+    UI.onRemove = UI.onRemove || function(callback) {
+      if(options.ui == false){
+        // No UI
+      }
+      else if(options.inBrowser) {
+        // Remove the DIV Element
+        console.log("Removing Step \""+identity.stepName+"\" of \""+identity.imageName+"\".");
+      }
+      else {
+        // Delete the NodeJS Object
+        console.log('\x1b[31m%s\x1b[0m',"Removing Step \""+identity.stepName+"\" of \""+identity.imageName+"\".");
+      }
+    }
+
+    return UI;
 
-  return {
-    el: options.el,
-    uniqueSelector: options.uniqueSelector,
-    selector: options.selector,
-    display: display,
-    remove: remove
   }
 
 }
diff --git a/src/modules/Crop/Crop.js b/src/modules/Crop/Crop.js
index ec9ad1c3..7502e00a 100644
--- a/src/modules/Crop/Crop.js
+++ b/src/modules/Crop/Crop.js
@@ -1,17 +1,15 @@
 module.exports = function Crop(input,options,callback) {
 
-  var getPixels = require("get-pixels"),
-      savePixels = require("save-pixels"),
-      base64 = require('base64-stream');
+  var getPixels = require('get-pixels'),
+      savePixels = require('save-pixels');
 
   getPixels(input.src,function(err,pixels){
-    var newdata = [];
     var ox = options.x || 0;
     var oy = options.y || 0;
     var w = options.w || Math.floor(0.5*pixels.shape[0]);
     var h = options.h || Math.floor(0.5*pixels.shape[1]);
     var iw = pixels.shape[0]; //Width of Original Image
-    newarray = new Uint8Array(4*w*h);
+    var newarray = new Uint8Array(4*w*h);
     for (var n = oy; n < oy + h; n++) {
       newarray.set(pixels.data.slice(n*4*iw + ox, n*4*iw + ox + 4*w),4*w*(n-oy));
     }
@@ -19,15 +17,21 @@ module.exports = function Crop(input,options,callback) {
     pixels.shape = [w,h,4];
     pixels.stride[1] = 4*w;
 
-    options.format = "jpeg";
+    options.format = input.format;
 
-    w = base64.encode();
+    var chunks = [];
+    var totalLength = 0;
     var r = savePixels(pixels, options.format);
-    r.pipe(w).on('finish',function(){
-      data = w.read().toString();
-      datauri = 'data:image/' + options.format + ';base64,' + data;
+
+    r.on('data', function(chunk){
+      totalLength += chunk.length;
+      chunks.push(chunk);
+    });
+
+    r.on('end', function(){
+      var data = Buffer.concat(chunks, totalLength).toString('base64');
+      var datauri = 'data:image/' + options.format + ';base64,' + data;
       callback(datauri,options.format);
     });
   });
-
-}
+};
diff --git a/src/modules/Crop/Module.js b/src/modules/Crop/Module.js
index b57cbc39..40e8ce6b 100644
--- a/src/modules/Crop/Module.js
+++ b/src/modules/Crop/Module.js
@@ -13,21 +13,23 @@
  *          y = options.y
  *          y = options.y + options.h
  */
- module.exports = function CropModule(options) {
+ module.exports = function CropModule(options,UI) {
    options = options || {};
    options.title = "Crop Image";
-   var this_ = this;
+   UI.onSetup();
    var output
 
    function draw(input,callback) {
 
-     const this_ = this;
+     UI.onDraw();
+     const step = this;
 
      require('./Crop')(input,options,function(out,format){
-       this_.output = {
+       step.output = {
          src: out,
          format: format
        }
+       UI.onComplete(out);
        callback();
      });
 
@@ -37,6 +39,7 @@
    return {
      options: options,
      draw: draw,
-     output: output
+     output: output,
+     UI: UI
    }
  }
diff --git a/src/modules/DecodeQr/Module.js b/src/modules/DecodeQr/Module.js
index c310bde4..bbe92666 100644
--- a/src/modules/DecodeQr/Module.js
+++ b/src/modules/DecodeQr/Module.js
@@ -1,23 +1,28 @@
 /*
  * Decodes QR from a given image.
  */
-module.exports = function DoNothing(options) {
+module.exports = function DoNothing(options,UI) {
   options = options || {};
   options.title = "Decode QR Code";
+  UI.onSetup();
   var output;
   var jsQR = require('jsqr');
   var getPixels = require('get-pixels');
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+
+    const step = this;
     getPixels(input.src,function(err,pixels){
       if(err) throw err;
       var w = pixels.shape[0];
       var h = pixels.shape[1];
       var decoded = jsQR.decodeQRFromImage(pixels.data,w,h);
-      this_.output = input;
-      this_.output.data = decoded;
+      step.output = input;
+      step.output.data = decoded;
       callback();
+      UI.onComplete(input.src);
     });
   }
 
diff --git a/src/modules/DoNothing/Module.js b/src/modules/DoNothing/Module.js
index cf5a5a09..f45712c0 100644
--- a/src/modules/DoNothing/Module.js
+++ b/src/modules/DoNothing/Module.js
@@ -1,20 +1,23 @@
 /*
  * Demo Module. Does nothing. Adds a step where output is equal to input.
  */
-module.exports = function DoNothing(options) {
+module.exports = function DoNothing(options,UI) {
   options = options || {};
   options.title = "Do Nothing";
-  var this_ = this;
-  var output
+  UI.onSetup();
+  var output;
 
   function draw(input,callback) {
+    UI.onDraw();
     this.output = input;
     callback();
+    UI.onComplete(this.output.src);
   }
 
   return {
     options: options,
     draw: draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
diff --git a/src/modules/DoNothingPix/Module.js b/src/modules/DoNothingPix/Module.js
index 64a0d483..0d1974ca 100644
--- a/src/modules/DoNothingPix/Module.js
+++ b/src/modules/DoNothingPix/Module.js
@@ -1,19 +1,24 @@
 /*
  * This module extracts pixels and saves them as it is.
  */
-module.exports = function DoNothingPix(options) {
+module.exports = function DoNothingPix(options,UI) {
 
   options = options || {};
   options.title = "Do Nothing with pixels";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [r, g, b, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype}
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -22,11 +27,13 @@ module.exports = function DoNothingPix(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
diff --git a/src/modules/GreenChannel/Module.js b/src/modules/GreenChannel/Module.js
index 6682f984..3b389dc4 100644
--- a/src/modules/GreenChannel/Module.js
+++ b/src/modules/GreenChannel/Module.js
@@ -1,22 +1,25 @@
 /*
  * Display only the green channel
  */
-module.exports = function GreenChannel(options) {
+module.exports = function GreenChannel(options,UI) {
 
   options = options || {};
   options.title = "Green channel only";
   options.description = "Displays only the green channel of an image";
+  UI.onSetup();
   var output;
 
-  //function setup() {} // optional
-
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [0, g, 0, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -25,12 +28,14 @@ module.exports = function GreenChannel(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     //setup: setup, // optional
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
diff --git a/src/modules/Invert/Module.js b/src/modules/Invert/Module.js
index 4ce42e02..65106427 100644
--- a/src/modules/Invert/Module.js
+++ b/src/modules/Invert/Module.js
@@ -1,22 +1,27 @@
 /*
  * Display only the green channel
  */
-module.exports = function GreenChannel(options) {
+module.exports = function GreenChannel(options,UI) {
 
   options = options || {};
   options.title = "Invert Colors";
   options.description = "Inverts the colors of the image";
+  UI.onSetup();
   var output;
 
   //function setup() {} // optional
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       return [255-r, 255-g, 255-b, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -25,12 +30,14 @@ module.exports = function GreenChannel(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     //setup: setup, // optional
     draw:  draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
diff --git a/src/modules/NdviRed/Module.js b/src/modules/NdviRed/Module.js
index 7d5df2fa..a6a9a230 100644
--- a/src/modules/NdviRed/Module.js
+++ b/src/modules/NdviRed/Module.js
@@ -1,21 +1,26 @@
 /*
  * NDVI with red filter (blue channel is infrared)
  */
-module.exports = function NdviRed(options) {
+module.exports = function NdviRed(options,UI) {
 
   options = options || {};
   options.title = "NDVI for red-filtered cameras (blue is infrared)";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       var ndvi = (b - r) / (1.00 * b + r);
       var x = 255 * (ndvi + 1) / 2;
       return [x, x, x, a];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -24,10 +29,13 @@ module.exports = function NdviRed(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
-    draw: draw
+    draw: draw,
+    output: output,
+    UI:UI
   }
 }
diff --git a/src/modules/SegmentedColormap/Module.js b/src/modules/SegmentedColormap/Module.js
index fcd46a57..00aa60b5 100644
--- a/src/modules/SegmentedColormap/Module.js
+++ b/src/modules/SegmentedColormap/Module.js
@@ -1,11 +1,15 @@
-module.exports = function SegmentedColormap(options) {
+module.exports = function SegmentedColormap(options,UI) {
 
   options = options || {};
   options.title = "Segmented Colormap";
+  UI.onSetup();
   var output;
 
   function draw(input,callback) {
-    var this_ = this;
+
+    UI.onDraw();
+    const step = this;
+
     function changePixel(r, g, b, a) {
       var ndvi = (b - r) / (r + b);
       var normalized = (ndvi + 1) / 2;
@@ -13,7 +17,8 @@ module.exports = function SegmentedColormap(options) {
       return [res[0], res[1], res[2], 255];
     }
     function output(image,datauri,mimetype){
-      this_.output = {src:datauri,format:mimetype}
+      step.output = {src:datauri,format:mimetype};
+      UI.onComplete(datauri);
     }
     return require('../_nomodule/PixelManipulation.js')(input, {
       output: output,
@@ -22,11 +27,13 @@ module.exports = function SegmentedColormap(options) {
       image: options.image,
       callback: callback
     });
+
   }
 
   return {
     options: options,
     draw: draw,
-    output: output
+    output: output,
+    UI: UI
   }
 }
diff --git a/src/modules/_nomodule/PixelManipulation.js b/src/modules/_nomodule/PixelManipulation.js
index 335cddca..efb25863 100644
--- a/src/modules/_nomodule/PixelManipulation.js
+++ b/src/modules/_nomodule/PixelManipulation.js
@@ -7,16 +7,15 @@ module.exports = function PixelManipulation(image, options) {
   options = options || {};
   options.changePixel = options.changePixel || function changePixel(r, g, b, a) {
     return [r, g, b, a];
-  }
-  var getPixels = require("get-pixels"),
-      savePixels = require("save-pixels"),
-      base64 = require('base64-stream');
+  };
+  var getPixels = require('get-pixels'),
+      savePixels = require('save-pixels');
 
   getPixels(image.src, function(err, pixels) {
 
     if(err) {
-      console.log("Bad image path")
-      return
+      console.log('Bad image path');
+      return;
     }
 
     // iterate through pixels;
@@ -25,7 +24,7 @@ module.exports = function PixelManipulation(image, options) {
     for(var x = 0; x < pixels.shape[0]; x++) {
       for(var y = 0; y < pixels.shape[1]; y++) {
 
-        pixel = options.changePixel(
+        var pixel = options.changePixel(
           pixels.get(x, y, 0),
           pixels.get(x, y, 1),
           pixels.get(x, y, 2),
@@ -40,19 +39,22 @@ module.exports = function PixelManipulation(image, options) {
       }
     }
 
-    options.format = "jpeg";
-
     // there may be a more efficient means to encode an image object,
     // but node modules and their documentation are essentially arcane on this point
-    w = base64.encode();
+    var chunks = [];
+    var totalLength = 0;
     var r = savePixels(pixels, options.format);
-    r.pipe(w).on('finish',function(){
-      data = w.read().toString();
-      datauri = 'data:image/' + options.format + ';base64,' + data;
+
+    r.on('data', function(chunk){
+      totalLength += chunk.length;
+      chunks.push(chunk);
+    });
+
+    r.on('end', function(){
+      var data = Buffer.concat(chunks, totalLength).toString('base64');
+      var datauri = 'data:image/' + options.format + ';base64,' + data;
       if (options.output) options.output(options.image,datauri,options.format);
       if (options.callback) options.callback();
     });
-
   });
-
-}
+};
diff --git a/test/chain.js b/test/chain.js
index d5c1ec59..6a77fca3 100644
--- a/test/chain.js
+++ b/test/chain.js
@@ -8,7 +8,7 @@ var test = require('tape');
 
 require('../src/ImageSequencer.js');
 
-var sequencer = ImageSequencer({ ui: "none" });
+var sequencer = ImageSequencer({ ui: false });
 var red = "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAAQABADASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAf/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAABgj/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwCdABykX//Z";
 
 test('loadImages/loadImage has a name generator.', function (t){
diff --git a/test/image-manip.js b/test/image-manip.js
index 38c0b79a..c54dd4cb 100644
--- a/test/image-manip.js
+++ b/test/image-manip.js
@@ -7,7 +7,7 @@ var test = require('tape');
 
 require('../src/ImageSequencer.js');
 
-var sequencer = ImageSequencer({ ui: "none" });
+var sequencer = ImageSequencer({ ui: false });
 var image = "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAAQABADASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAf/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAABgj/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwCdABykX//Z";
 var qr = require('../examples/IS-QR.js');
 sequencer.loadImages(image);
diff --git a/test/image-sequencer.js b/test/image-sequencer.js
index de170852..3c52423b 100644
--- a/test/image-sequencer.js
+++ b/test/image-sequencer.js
@@ -25,7 +25,7 @@ function copy(g,a) {
 var parent = (typeof(global)==="undefined")?window:global;
 var global1 = copy(true,parent);
 
-var sequencer = ImageSequencer({ ui: "none" });
+var sequencer = ImageSequencer({ ui: false });
 var red = "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAAQABADASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAf/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAABgj/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwCdABykX//Z";
 
 test('Image Sequencer has tests', function (t) {