Add Support for XInput

[wildgoosespeeder]

Instead of replace, add. Context:

#15

[Formedras]

When adding XInput support, please also add touchscreen support using XInput. It kinda sucks trying to play TWEWY on touchscreen when you have to double-tap to single-tap.

[zeromus]

I dont know what touchscreen support using xinput means. Double tapping and single tapping doesnt sound like it has anything to do with xinput.

[Formedras]

For whatever reason, without specific touchscreen support, a single tap functions as mouse placement, and it takes a second tap to actually click. (It probably works just fine with a pen digitizer though.) ... Hmm. Just made a quick search; looks like XInput and the touchscreen are unrelated. I just assumed because of XNA. (Which is a pretty dumb assumption.) Sorry.

[zeromus]

For "whatever reason" -- otherwise legacy applications would be impossible to use on a touch screen.

Open a ticket with "use windows touch APIs" and find another opensource c++ windows program, preferably an emulator, which works the way you want, as a reference.