Sega Saturn improvements:
- New: Added Yabause emulator for older devices (GLES2)
- New: Save states
- Fix: Use HLE BIOS by default (fixes most games)
- Fix: Original aspect ratio set to 4:3
- New: Separated 4:3 and square pixel (1:1) aspect ratio options
- New: Better / seamless game start (no flashing)
- New: Option to disable help screen on game start
- New: Add Modern gamepad type for FBNeo
- New: Game specific fixes for PSX
- New: Frameskip setting for mGBA
- Fix: PC Engine CD now works again