Wraith

Changes:
 - Added Wraith for front-end regression testing.
 - Added SCSS linting task to Grunt to enforce consistent code style.
 - Switched to using libsass for faster SCSS compilation
 - Removed old prototypes and related styes.
 - Cleaned up code to match linter's code requirements.

![wraith](http://cdn.tabletitans.com/img/bestiary/wraith.jpg)