ES5 option is now set per default.
Add devDeps and Gruntfile for an improved workflow.
jshint-happify.
Add clean task to clean up after test cases.
* Turn `index.html` into a `lo-dash` template.
* Use 4 spaces instead of 2 as conducted by `.editorconfig`.
* Clean up `bower.json`.
* Remove now unnessary `main.js`.
* Clean up npm deps.
* Clean up Gruntfile.js.
* Use Gruntfile.coffee for its improved readability.
Merge pull request #22 from janraasch/feature/spring-cleaning

Spring cleaning