- Add cartridge software list and IPF floppy format to all sets
- Add missing handlers to (still non-working) ste, megast and megaste memory maps, making megaste a megast derivative
- Give HD6301 its own XTAL
- Use array finders for HD6301 keyboard and joystick ports
- Swap players for joystick and button inputs (needed for mouse to work)
- Remove shifter mode 1 kludge that seems to hurt more than help
Get rid of a couple of copies of the CC0 text. Add header comment to
CC0 files to remind people editing them what the terms are. Also add
some missing XML headers. The header comments in layouts won't bloat
the binary - they get stripped out before compressing, same as any other
comments.
