4952 opensource alpha 1

Binary release of the 4952 Open Source demos.

Basic-80 is mostly working, lacking in routines for disk and serial i/o.
Some other demos are included to assist in exploring the memory, charset, and ports.
A simple 64x32 blocky graphics demo is now included as well.

All the demos should be safe to run, but keep a backup of your disks just in case.