Accessing wheel only when not driving

Wheel is now only accessed by plugin when player is not driving, so buttons are not reserved for plugin on stage.
This basically means that, if for example handbrake is set to button X, plugin doesn't even know it's pressed while driving, but on menu/pause screen etc. it handles the button press.

Wheels requiring polling, should work now!

• Implemented polling, if wheel needs it.
• Wheel input now more consistent.

Now completely in C++

Seems to be working fine, still with Thrustmaster T150.

First release

Works fine with Thrustmaster T150, not sure if it works with other wheels.