grafx - Extensible Java Graphics Package Code

Rearranging some stuff in RasterDepthGraphics.

Adding a comment and an explicit cast to NormalizeZ.

Adding random test cases to NormalizeZ, found no errors.

Refining some comments in RasterDepthGraphics.

Adding class NormalizeZ which is some test code.

Adding a main() method to net.blockout.production.Blocks which prints out how
many of each cardinality there are. For example there are 29 5-er blocks.

Carrying over the recent changes to edges & clipper to Gouraud shading tech.

Saving changes because I'm likely going to back everything out.

Pure comment changes. I want to save these comments, because as I'm writing
them I realized that we should do polygon clipping in a pre z normalized state.

Going over more of the 3D rendering code with a fine-toothed comb.