Use bower, drop grunt, split packages

- [x] Pull deps from bower
- [x] Drop grunt, use [emberjs/ember.js/blob/master/bin/build.js](https://github.com/emberjs/ember.js/blob/master/bin/build.js)
- [x] Run qunit in phantom with [jonkemp/qunit-phantomjs-runner](https://github.com/jonkemp/qunit-phantomjs-runner/blob/master/runner.js)
- [x] Split packages up