New version of the multi-system emulator for PC.

Changelog:

- [Xe] new execution core.
- [Xe/Linux] Modified joypad analog axis access.
- [PC Engine CD-ROM2] Fixed audio status report.
- [Super Famicom] Fixed affine mode priority.
- [FM Towns Marty] Fixed floppy disk status. (Thanks to Parazythum for the Car Marty info)
- [FC-FX] PC-FX support.
- [Game Boy Advance] Game Boy Advance support