Detect and Parse string separated module names (#787)

* detecting and parsing string separated module names

* test fix

* parsing multiple input methods

* travis fix

* test cases

* requested changes made

* test fix

* rebase and fix conflicts

src/ImageSequencer.js

@@ -308,6 +308,9 @@ ImageSequencer = function ImageSequencer(options) {
     exportBin: exportBin,
     modulesInfo: modulesInfo,
     toCliString: str.toCliString,
+    detectStringSyntax: str.detectStringSyntax,
+    parseStringSyntax: str.parseStringSyntax,
+    stringToSteps: str.stringToSteps,
     toString: str.toString,
     stepToString: str.stepToString,
     toJSON: str.toJSON,