Add Thread::callbacks and Post::callbacks.

4chan_x.user.js

@@ -624,6 +624,8 @@
       g.threads["" + board.ID + "." + this.ID] = board.threads[this.ID] = this;
     }
 
+    Thread.prototype.callbacks = [];
+
     return Thread;
 
   })();
@@ -639,6 +641,8 @@
       g.posts["" + board.ID + "." + this.ID] = thread.posts[this.ID] = board.posts[this.ID] = this;
     }
 
+    Post.prototype.callbacks = [];
+
     return Post;
 
   })();

script.coffee

@@ -486,6 +486,7 @@ class Thread
     @posts = {}
 
     g.threads["#{board.ID}.#{@ID}"] = board.threads[@ID] = @
+  callbacks: []
 
 class Post
   constructor: (@root, @thread, @board) ->
@@ -493,6 +494,7 @@ class Post
     @el = $ '.post', root
 
     g.posts["#{board.ID}.#{@ID}"] = thread.posts[@ID] = board.posts[@ID] = @
+  callbacks: []
 
 Main =
   init: ->