Added the keys() function to the Map interface, replaced instances of

SimpleMap with HashMap. Discarded SimpleMap.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4122 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/util/MessageManager.as

@@ -177,7 +177,7 @@ public class MessageManager
 //    protected var _loader :ClassLoader;
 
     /** A cache of instantiated message bundles. */
-    protected var _cache :SimpleMap = new SimpleMap();
+    protected var _cache :HashMap = new HashMap();
 
     /** Our top-level message bundle, from which others obtain messages if
      * they can't find them within themselves. */