Task lists WIP:

* initializing some code parts
* mechanism to add font-awesome icons to the defaults one that
  ConverseJS uses
* new way to override ConverseJS index.js (to add new custom plugins,
  that are directly build into ConverseJS)

conversejs/custom/plugins/tasks/task-lists.js

@@ -0,0 +1,16 @@
+import { Collection } from '@converse/skeletor/src/collection.js'
+import { ChatRoomTaskList } from './task-list'
+
+/**
+ * A list of {@link _converse.ChatRoomTaskList} instances, representing task lists associated to a MUC.
+ * @class
+ * @namespace _converse.ChatRoomTaskLists
+ * @memberOf _converse
+ */
+class ChatRoomTaskLists extends Collection {
+  model = ChatRoomTaskList
+}
+
+export {
+  ChatRoomTaskLists
+}