Cleanup makefile.
Merge pull request #11 from sergiobenrocha2/master

Cleanup makefile.
Merge pull request #12 from Oggom/master

Sync with main repo
(config.lcd) Build fix
Merge pull request #13 from lordashram/master

(config.lcd) Build fix
Merge https://github.com/ekeeke/Genesis-Plus-GX
Implement input descriptors
Change core options namespace
Implement cheatcode support - implement retro_cheat_reset/retro_cheat_set
Merge pull request #38 from libretro/master

Libretro Updates