EmuTOS 0.9.8

Major changes:
- Amiga: New boot floppy target
- Amiga: Rewrite floppy routines
- Amiga: Support multiple video modes
- BIOS: Autodetect IDE interface with twisted cable at run-time
- EmuDesk: Add support for desktop shortcuts
- EmuDesk: Add support for formatting floppies
- EmuDesk: Add support for user-assignable desktop icons