Remove binding between RoomListForm and RoomForm and reformat code.

This commit allows user to do a series of operations(via press and hold)
on a room without entering the room in RoomForm.
Fixes #14.

src/roomlistmodel.h

@@ -18,7 +18,7 @@ class RoomListModel : public QAbstractListModel {
     TopicRole,
     CategoryRole,
     HighlightRole,
-    UnreadCountRole,
+    UnreadCountRole
   };
 
   RoomListModel(QObject* parent = 0);