20191201

Changelog:

• Renamed GCW0 to OpenDingux to reflect device compatibility
• Unified keymaps to the openhandheld standard
• Menu now only shows current system (GB/GBC) relevant options
• Added fast forward hotkey (hold L trigger)

OPK: OpenDingux package (compatible with RG-350 / GKD350H / PocketGo2 / GCWZero)
IPK: RetroFW package (compatible with RS-97 / RS-97 Plus / RS-97 Pro / RetroGame Plus / RetroGame Pro / LDK Vertical / LDK Landscape/ RG-300 and other RetroFW devices)