Test suite

- [x] setup karma + mocha + travis
- [x] server side tests
- [x] client side tests
  - [x] models
  - [x] collections
  - [x] router
  - [x] views
- [x] grunt adjustments - JS is borking on heroku/production
- [x] remove yeoman generated CSS/SASS and exchange with our CSS (now with SASS)
- [ ] revisit pending client side tests