Massive JavaScript cleanup

- Use JSX for templates
- Docblock/comment everything
- Mostly passes ESLint (still some work to do)
- Lots of renaming, refactoring, etc.

CSS hasn't been updated yet.

js/lib/initializers/store.js

@@ -1,16 +1,22 @@
-import Store from 'flarum/store';
-import Forum from 'flarum/models/forum';
-import User from 'flarum/models/user';
-import Discussion from 'flarum/models/discussion';
-import Post from 'flarum/models/post';
-import Group from 'flarum/models/group';
-import Activity from 'flarum/models/activity';
-import Notification from 'flarum/models/notification';
+import Store from 'flarum/Store';
+import Forum from 'flarum/models/Forum';
+import User from 'flarum/models/User';
+import Discussion from 'flarum/models/Discussion';
+import Post from 'flarum/models/Post';
+import Group from 'flarum/models/Group';
+import Activity from 'flarum/models/Activity';
+import Notification from 'flarum/models/Notification';
 
-export default function(app) {
-  app.store = new Store();
-
-  app.store.models = {
+/**
+ * The `store` initializer creates the application's data store and registers
+ * the default resource types to their models. It then preloads any data on the
+ * application's `preload` property into the store. Finally, it sets the
+ * application's `forum` instance to the one that was preloaded.
+ *
+ * @param {App} app
+ */
+export default function store(app) {
+  app.store = new Store({
     forums: Forum,
     users: User,
     discussions: Discussion,
@@ -18,5 +24,9 @@ export default function(app) {
     groups: Group,
     activity: Activity,
     notifications: Notification
-  };
+  });
+
+  app.store.pushPayload({data: app.preload.data});
+
+  app.forum = app.store.getById('forums', 1);
 }