grafx - Extensible Java Graphics Package Code

Paving the way for instance reuse of DepthPolyEdge.

Making some optimizations to Donut.

Making it possible to reuse a FloatColor instance.

Making some final improvements to Donut. The debugging code has been removed
for example.

Finally fixed the GOURAUD_SHADING in Donut. Still want to tie up some loose
ends though.

There is still a problem with Donut.

Got something working in Donut. Still debugging.

I realized that we probably need to do normal computations post transformation.
Saving work in case I need to roll something back.

Populating m_vNormals and m_fNormals in Donut.

Adding class VectorUtils for demo purposes.