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

tests/src/java/com/threerings/miso/viewer/ViewerFrame.java

@@ -27,7 +27,6 @@ import java.awt.Component;
 import java.awt.GraphicsConfiguration;
 import java.awt.event.ActionEvent;
 
-import javax.swing.JFrame;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;