[Input] Implemented JoystickHat GamePad mapping
[Input][SDL] Fix JoystickHat bugs

On SDL, DPad inputs were not correctly translated from joystick
hat inputs.
Updated MappedGamePadDriver so that it will correctly recognize
combined joystick hat directions e.g. DPadLeft should be true when
DownLeft, Left, or UpLeft are returned from the joystick hat.
Changed the nuspec to implement custom version numbers.