grafx - Extensible Java Graphics Package Code

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.

Adding test code LessThanOneF. Running into some rather strange behavior.

Changing some options in Donut.

Adding average millis per frame render. This is really useful to help us
understand performance improvements!

First stab at optimizing the line-interpolated line drawing.

Carrying over the bounded() optimizations to all line-drawing code that uses
constant color.

Wrapping the code around an outer loop so that a block isn't repeated.