Add two features our multi-locale yohoho is going to need:

- Ability to set a locale prefix in which to search for locale-specific images.
- Ability to clear the image cache (we want to do this when we switch locales, otherwise we end up with wrong-language images cached.)


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@83 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/media/image/ImageManager.java

@@ -136,6 +136,16 @@ public class ImageManager
         this(rmgr, new AWTImageCreator(context));
     }
 
+    /**
+     * Clears all images out of the cache.
+     */
+    public void clearCache ()
+    {
+        Log.info("Clearing image manager cache.");
+
+        _ccache.clear();
+    }
+
     /**
      * Creates a buffered image, optimized for display on our graphics
      * device.