Super Grav: Support For Classic SNES and NES-Style Gamepads Added

Update v1.3.6 adds support for a bunch of classic SNES and NES-style gamepads: iBuffalo Classic USB GamePad (wired - fantastic gamepads for 4-Player Grav!) 8Bitdo SNES30 / SFC30 GamePad (wireless SNES-style gamepad) 8Bi…