Upgrade to Ember 1.11-beta.1

HTMLBars goodness! Since there was some breakage and a lot of fiddling
around to get some things working, I took this opportunity to do a big
cleanup of the whole Ember app. I accidentally worked on some new
features too :3

Note that the app is still broken right now, pending on
https://github.com/emberjs/ember.js/issues/10401

Cleanup:
- Restructuring of components
- Consolidation of some stuff into mixins, cleanup of some APIs that
will be public
- Change all instances of .property() / .observes() / .on() to
Ember.computed() / Ember.observer() / Ember.on() respectively (I think
it is more readable)
- More comments
- Start conforming to a code style (2 spaces for indentation)

New features:
- Post hiding/restoring
- Mark individual discussions as read by clicking
- Clicking on a read discussion jumps to the end
- Mark all discussions as read
- Progressively mark the discussion as read as the page is scrolled
- Unordered list post formatting
- Post permalink popup

Demo once that Ember regression is fixed!

ember/app/initializers/human-time-updater.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 
-import humanTime from '../utils/human-time';
+import humanTime from 'flarum/utils/human-time';
 
 var $ = Ember.$;
 
@@ -28,7 +28,7 @@ export default {
 	      .removeData('livestamp');
 
 	    timestamp = moment(timestamp);
-	    if (timestamp.diff(moment()) < 60 * 60) {
+	    if (timestamp.diff(moment(new Date())) < 60 * 60) {
 	    	return;
 	    }
 	    if (moment.isMoment(timestamp) && !isNaN(+timestamp)) {
@@ -144,4 +144,4 @@ export default {
 	})(jQuery, moment);
 
   }
-};
+};