grafx - Extensible Java Graphics Package Code

Adding missing 'd' making it '0.5d'.

Really cleaning up the 2D rendering code. It's perfect. I think.

Finished making changes and testing PixelAndPoly.

Adding a comment, alias() function won't change.

Adding test code 'PixelAndPoly'.

Removing commented out System.out.println() statements.

Introducing GRENZE_EINS_UPPER and GRENZE_EINS_LOWER.

Class LessThanOneF turned into a performance test.

Adding class AliasIsntCast which reminds us that we're casting from the
interval [1.0,2.0). Casting from values just barely below that will give
different results.

Trying to diagnose problem with GRENZE_EINS.