grafx - Extensible Java Graphics Package Code

I think this is the update I needed for ClipRectangle. It's in one of three
states: isArea(), isDegenerate(), or isInverted().

Adding TestClip which exposes a bug with setClip().

Adding a Javadoc TODO.

Am stuck on clipping in TiledDepthGraphics. Had to add the getPointAlias()
method to DepthGraphics interface, unfortunately.

Making some progress on TiledDepthGraphics.

Making a little bit more progress on TiledDepthGraphics.

Making progress on TiledDepthGraphics.

Improving the Javadoc in TiledDepthGraphics.

Adding mega Javadoc at the class level in TiledDepthGraphics. Man I've learned
to type fast.

Adding beginnings of class TiledDepthGraphics. This is only for test code.