[Feature] Adding ember-list-view-scrolling class when scrolling

* Dasherize the filenames
* ES6 imports now relative paths
* Changed this.set/this.get to get(this, ..) set(this, ..) to be consistent
* Other OCD changes
Would be awesome if we could use scrollComplete event on zynga's scroller for the virtual list view but that this is pretty broken.  Pull requests opened since January to fix it.