Other controller support

[Formedras]

For the Desktop profile (and HoloLens and Hub if you list them in the manifest), please implement support for controllers other than XInput 2.x. It is possible to do so in Microsoft Store apps (see Killer Instinct), but I wouldn't know how.
I use both a DualShock4 and an Xbox 360 fightstick; I know the fightstick doesn't work, and I'd assume neither does the DS4. Presumably this is because the base support for gamepads is limited to XInput 2 (Xbox One controllers).