#1 Pixel rendering is too slow

[Sacred Ring]

The Resolution ][ pixel rendering routines are too slow. The pixel rendering algorithms can be further optimized to draw pixels faster even when running on a 1MHz Apple ][ machine.

[Sacred Ring]

Implemented new pixel drawing routines. Instead of performing color calculations directly, the color pixel drawing routine uses a table of color values and masks. The monochrome pixel drawing routine uses a table of monochrome masks and also supports toggling pixels using XOR.