Make background rendering behind NetRenderDemo work.
Moving stuff around for the qt2d thinger.
Urghhhh.
Make NetRenderDemo do some swishing around.  Background rendering isn't quite right.
Make tile image 1 have a green dot in the middle.
Fix various things about VizState rendering; move rendering code to Renderer.
Add SLIP, which has been laying around on Harold for a long time and may become useful.
Add a break in a switch in GameClient.java.
Add some network packet transport stuff of questionable value.
Bunch of classes for a simulator with completely immutable states.
SimNode demo stuff.
Working on Room -> VizState stuff, which is kind of annoying.
Write more overcomplicated code that doesn't quite work.
Some refactoring, and Game19.