Responsive design baby!

Mobile responsive design with a very native feel, all in pure CSS (no
templating differences between versions — even though some things are
in very different positions.)

I’ve been working on this whole thing in my head for a while now,
planning out how certain components will be laid out on the mobile
version, and how to reason about them in the templates so that a
substantially different layout can still be achieved by only using CSS.
Today I finally wrote the CSS and it’s come together pretty damn
perfectly.

Still to come:
- Swiping left or right on discussions to reveal controls
- Tablet version

ember/app/components/ui/dropdown-select.js

@@ -7,7 +7,7 @@ import Ember from 'ember';
 export default Ember.Component.extend({
   layoutName: 'components/ui/dropdown-select',
   classNames: ['dropdown', 'dropdown-select', 'btn-group'],
-  classNameBindings: ['itemCountClass', 'class'],
+  classNameBindings: ['itemCountClass', 'className'],
 
   buttonClass: 'btn btn-default',
   menuClass: '',