Grunt - cli companion, testing & building

New:

* added Grunt with tasks for build and test
* added [Bootcamp](https://github.com/thejameskyle/bootcamp/wiki/Introduction) for testing scss functions
* added CSSlint (with pretty forgiving options) for making sure compiled css is well-formed
* added JSHint (with concat + uglify) to make sure js is well-formed
* added jQuery to bower dependencies

Possible next steps:

* set up Travis to use `grunt test` for running tests

ping @lifeiscontent