Dispatch an event when config values change.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4603 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/util/Config.as

@@ -22,11 +22,12 @@
 package com.threerings.util {
 
 import flash.events.NetStatusEvent;
+import flash.events.EventDispatcher;
 
 import flash.net.SharedObject;
 import flash.net.SharedObjectFlushStatus;
 
-public class Config
+public class Config extends EventDispatcher
 {
     /**
      * Constructs a new config object which will obtain configuration
@@ -53,6 +54,9 @@ public class Config
     {
         _so.data[name] = value;
         _so.flush(); // flushing is not strictly necessary
+
+        // dispatch an event corresponding
+        dispatchEvent(new ConfigValueSetEvent(name, value));
     }
 
     /**