RetroArch .cfg support

[garbear]

I'm opening an issue to track RetroArch .cfg format support (https://github.com/libretro/retroarch-joypad-autoconfig). Hopefully we'll be able to share as many button maps as possible with them.

[pcathm]

Hi Garbear, did you need someone to make an adaptor for this file type, or were you planning on implementing this yourself?

[garbear]

Help is welcome :) I kinda hacked xml support, but it shouldn't be too hard to add a "cfg" folder here and use the xml folder as a reference

[garbear]

I'm trying to turn the RetroArch .cfgs into a resource.buttonmaps.cfg add-on. My first attempt was to hack it into the build system: 5ced19c. I'm sure there's a better way, I'll see what the build system guys say.

[LipkeGu]

The Friends from recalbox could help you with keymaps