Beta 12 (RC1)

- added quick enable/disable checkboxes to floppy panel
- non-word aligned word writes to custom registers emulated correctly
- byte writes to custom registers emulated properly on a 68060 (perhaps only Blizzard 68060 cards´ feature?)
- 68020 "cycle-exact" does not anymore freeze when switching to RTG mode (but it still should not be used)
- Nordic Power v2.0 support (got another "blue" Nordic Power today, also "cartridge support" credits added to contributors list) rom zoned.