grafx - Extensible Java Graphics Package Code

In constant color line drawing functions, the cast of z value from double to
float to int now takes place in a place which is offset by m_normalizedFront,
so that proximity to zero is avoided, which would have failed to drop
accumulated errors as effectively. I still have some work to do, esp. in the
code that interpolates colors, as the color components need the same treatment.
Polygon filling also needs to be updated eventually. Right now both worlds can
coexist because I have parallel sets of variables or functions.

Fixing a small typo in constant color line drawing routine. This error was
introduced as some point by accident.

Streamlining the constant color line drawing routines, no longer accessing
array members in the inner loop.

Using m_foff in the constant color line drawing routines.

In color interpolated line drawing code, doing more accurate aliasing
computations for xx and yy, by using m_foff.

Adding a new level 30. It's a 7x5 pit with only sixer blocks.

Upping qSearchBreadth from 24 to 32.

Upping the bowl metrics just a tad.

Adding some commented out code.

Really improving AllBlocksGifImage; the image width is constant at 1280 pixels,
vertical and horizontal spacing are calculated, static constants defined for
e.g. number of columns, a filter function added for easy image modification.