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/controllers/application.js

@@ -2,22 +2,22 @@ import Ember from 'ember';
 
 export default Ember.Controller.extend({
 
-	// The title of the forum.
-	// TODO: Preload this value in the index.html payload from Laravel config.
-	forumTitle: 'Flarum Demo Forum',
+  // The title of the forum.
+  // TODO: Preload this value in the index.html payload from Laravel config.
+  forumTitle: 'Flarum Demo Forum',
 
-	// The title of the current page. This should be set as appropriate in
-	// controllers/views.
-	pageTitle: '',
+  // The title of the current page. This should be set as appropriate in
+  // controllers/views.
+  pageTitle: '',
 
-	backButtonTarget: null,
+  backButtonTarget: null,
 
-	searchQuery: '',
-	searchActive: false,
+  searchQuery: '',
+  searchActive: false,
 
-	actions: {
-		search: function(query) {
-			this.transitionToRoute('index', {queryParams: {searchQuery: query, sort: query ? 'relevance' : 'recent'}});
-		}
-	}
+  actions: {
+    search: function(query) {
+      this.transitionToRoute('index', {queryParams: {searchQuery: query, sort: query ? 'relevance' : 'recent'}});
+    }
+  }
 });