grafx - Extensible Java Graphics Package Code

Fixing a subtle minor line drawing bug that would happen rarely.
Updating headers on all files.

Updating stuff.

This commit was manufactured by cvs2svn to create tag 'start'.

Starting project blockout

implementing edge pool for polygon filling. no doubt, there are bugs
being introduced with this change.

edited javadoc slightly (aesthetic).

made lots of changes to RasterFloatGraphics:
- added hook to do alpha manipulation (RasterFloatPixBuff).
- condensed a lot of code, and put it into new classes FloatPolyEdge and
FloatPolyClipper.
- cleaned up implementation of clear().
- fixed up color conversions between FloatColor and int.

my next goal is to fix any bugs that these changes may have created, and to
implement a FloatPolyEdge pool, so that 'new' would not have to be called for
every FloatPolyEdge; drawing many polygons would otherwise lead to rapid
memory allocation and de-allocation and re-allocation (new edges created all
the time).

updating javadoc.

adding a little spiffy clip technology to the simple demo.

adding constructor to FloatColor for opaque colors.