Add support for Grunt and Compass

[Compass](http://compass-style.com), along with [Sass](http://sass-lang.com), would make the CSS stylesheets included with this plugin much easier to maintain. Additionally, Compass provides functions that can automatically convert SVG files into inline base64 code for the MP6 icon

[Grunt](http://gruntjs.com) is a task runner that can run build tasks such as JSHint, Compass and UglifyJS. UglifyJS could be used to compress all of the CodeMirror scripts into a single file and save page load times.