Joystick support (win only) improved stereo

Joystick ANE from http://alexomara.com/?p=blog&post=7
Added setup for oculus tracker in the SpaceShip
improved keyboard controls (arrows and +,- for speed)
improved stereo seperation using my real IPD
tried to adhere to 1 unit = 1 meter, earth is only 12 km wide now :-)
Away3d goes nuts when the far and near of the lens is even further apart
then they are now.

The Air folder in the demo contains a runnable demo (try with a
joystick, i tested with a logitech Extreme 3D pro) Xbox controller is
not supported.