FlightGear - Flight Simulator FGAddon

* The door now has a nice contour on the inside, prevent the ladder from intersecting it.
* Hide the new landing light cones from preview in fgrun.
* Hide the landing lights, as well as their cones, when turned off.
* When engaging the autopilot, initialize the aileron and elevator positions in the
autopilot with the current surface positions, to avoid brutal changes.
* The light knob in the cabin now turns clockwise to increase light.