Adding function to detect joystick names on Win/Mac/Linux.

Allows distinguishing between PS3/XBOX 360/etc. controllers for button mapping: 

    trace(stage.getJoystickName(0));    // displays "Sony PLAYSTATION(R)3 Controller"

I think it'd be great to also check for known controller names in lime/helpers/Gamepad.hx and automatically set the button profile, which will save downstream projects like HaxePunk/HaxeFlixel some duplication of effort.

A pull request to update the openfl-native API and add this function is also ready.