grafx - Extensible Java Graphics Package Code

Reverting back to clipping polygons along z axis in the post-normalized state.

Putting the line z-clipping in place. Getting a decent strategy in order.

Removing the drawLine() of varying color; simplifying the 3D graphics API and
comments.

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.