implement importNewModule (#294)

* implement importNewModule

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* make apis available on input object

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* update docs

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* minor updates and more docs

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* major refactor simplify module loading

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* final updates and invert installed from npm

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* update contributing.md

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* fixes

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

* update documentation

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

test/modules/testModule/Module.js

@@ -0,0 +1,20 @@
+module.exports = function testModule(options, UI) {
+
+  var output;
+  function draw(input, callback) {
+
+    var output = function(input) {
+      return input;
+    }
+
+    this.output = output(input); // run the output and assign it to this.output
+    callback();
+  }
+
+  return {
+    options: options,
+    draw: draw,
+    output: output,
+    UI: UI
+  }
+}

test/modules/testModule/info.json

@@ -0,0 +1,5 @@
+{
+    "name": "test",
+    "description": "Outputs the same image.",
+    "inputs": {}
+}