Changes

:"Just works out of the box" solution for Genesis/Mega Drive, CD & 32X, bundled with two cores (Genplus-GX/Genesis Plus GX with [https://github.com/TASEmulators/BizHawk/issues/1528 Nuked OPN2 support] and PicoDrive), ensuring both excellent compatibility and good speed without needing to mess with RetroArch. Compatible with "genesis_plus_gx_libretro and picodrive_libretro".