More faffing about.

- started making chat UI stuff
- upgraded SimpleMap some to use the new Dictionary class
- Lots of experimenting with attaching functions to interface implementations.
I've upgraded to the new beta of Flex and it's giving me the pain. There's
new compiler bugs and I am working blind right now.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3966 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/crowd/chat/client/ChatDirector.as

@@ -105,7 +105,9 @@ public class ChatDirector extends BasicDirector
      */
     public function addChatDisplay (display :ChatDisplay) :void
     {
-        _displays.addItem(display);
+        if (-1 == _displays.getItemIndex(display)) {
+            _displays.addItem(display);
+        }
     }
 
     /**