[ardrone2] GPIO hack removed
[ArDrone] GPIO rewritten to make paparazzi API more consistent
[ArDrone] Add protection to lowlevel driver that can short-circuit the board.
[ArDrone] Redirected paparazzi LED to ArDrone motor-controller LED
[ArDrone] Default LEDS
[ArDrone] Extra Safety
Merge pull request #520 from fvantienen/master

[ardrone2] GPIO hack removed, Safety added and LED's redirected to motor controllers