Altra64 fork for ED64 Plus

Mod support had been disabled due to issues with libmikmod.
Hopefully it will get fixed in the future.

It also...

• Removes the anti-protection for the ED64P
• Allows it being set as the default menu for the ED64P
• Fixes an issue with EEPROM sizes being incorrect

Other than that, it's mostly based upon upstream so no other huge changes from that.

Known issues :

• Bringing the config menu for each game (C right) is slow and sluggish. Not sure what causes this.

• There's no database for problematic games. For example:
  Pokemon Stadium 2 (French) needs to be forced into PAL mode for both the TV & country setting.
  Alek64 games requires the 5101 CIC, DD64 carts need the 5167 CIC instead.
  This is not autodetected so it needs to be forced with C right. You only need to do this once.

Some games will refuse to save, like Custom Robo v2. I have no idea why.