Add in @Overrides across the board, clean up the comments around them some, and remove

unneeded imports.
I've got partially completed patches for narya & vilya, too, but nenya was the 
only one that wound up in a decent state after a friday evening puttering at it,
killing time waiting on other things to finish.


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@572 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/media/animation/FadeImageAnimation.java

@@ -42,7 +42,7 @@ public class FadeImageAnimation extends FadeAnimation
         _image = image;
     }
 
-    // documentation inherited
+    @Override
     protected void paintAnimation (Graphics2D gfx)
     {
         _image.paint(gfx, _bounds.x, _bounds.y);