grafx - Extensible Java Graphics Package Code

Fleshing out more of the line drawing.

Changing order of some operations, after careful examination this should not
have any impact on algorithm correctness.

Fleshing out more of drawLine().

Setting m_lineClip in setClip().

Getting the ball rolling on drawLine().

Implemented the line clipper.

Reducing sizes of arrays to not have duplicates.

Back face culling on DRAW_VERTICES. Little by little.

Drawing vertices first, in Donut.

Some little changes here and there. A big change is that the pixel is first
come takes precedence in the z buffer. Other stuff drawn later at same z value
will not be drawn.