Fix 'instanciate' typo; correct is 'instantiate'
Merge pull request #496 from Valloric/typo-fix

Fixed 'instanciate' typo; correct is 'instantiate'
Fixed joystick POV values on Windows (PovX and PovY were inverted)
Fixed joystick POV values on Windows (PovX and PovY were inverted)

This reverts commit f1c30f106af0c27bb82331220716f1ab3e753d7d, which contained the wrong file, and adds the right modification.
fix a few typos in comments