grafx - Extensible Java Graphics Package Code

Adding a TODO comment for a possible future optimization in line drawing, where
bounded() call isn't necessary for each pixel, where it bounds the current z
value.

Removing m_zfoff and setPix2().

Beginning to reorganize setPix().

Removing m_foff from RasterDepthGraphics.

Getting rid of member vars m_clipYMax2, m_clipYMin2, m_clipXMax2 & m_clipXMin2.

Starting to incorporate the alias() call in polygon filling routines, 3D grafx.

Changing an indentation level in the code, for clarity.

In 3D graphics with the new floating point casting strategy, starting to
implement some of the polygon filling stuff.

Carrying over the xf/yf changes in line drawing for the color interpolated code
too, this is so that the cast to float happens right around 1.0.

In 3D line drawing of constant color, starting to implement the correct xf/yf
strategy where it's being compared against 1.0f.