grafx - Extensible Java Graphics Package Code

Adding launcher scripts for 2D polygon filling and line drawing demos.

Adding scripts/clean.sh.

Adding some launcher scripts and adding svn:ignore property for generated build
directory.

Adding 2D rendering demo code. Already made some changes to SimpleDemo.

Adding class com.nerius.grafx.d3.demo.Donut class and ALL OF THE DEPENDENCIES
to get it to run. A library is useless without proof that it can work, and a
demonstration of how it works.

Finally, adding 3D graphics library. This has really matured quite a bit. I
would still like to expose some decent test code somehow; right now the Donut
test code, which is really superb, has some dependencies that I don't want to
include.

Removing TODO.txt for 3D graphics lib, already done all of it. Thanks.

Removing extra 'demo' and 'img' code.

Moving over the latest and greatest 2D rendering library. Mostly improvements
in the alias(), pixel(), simplifications in line drawing via better choice of
m_lineClip.

Redoing some aspects of combinatorics (combinations of options) in Donut.