GXemul Code2

Better separation of pckbc scancode translation tables 1, 2, and 3, and beginning to play around with PS/2 mouse movement.

Some progress on the hw accelerated graphics operations used by NetBSD/sgimips Xorg driver.

Updating NetBSD/sgimips guest OS instructions to version 8.0.

Updating TODO to current state.

Network address of _client_ machines is usually 10.0.0.1.

Next release will more likely be 0.6.1 than 0.6.0.3.

Minor documentation improvements.

ARCS environment fixes (better values for diskless booting).

Some cleanup and refactoring of the O2 rendering engine and other things.

Minor SGI O2 fixes and comments.