[fixedwing] energy_ctrl: don't keywords reserved in c++
[modules] light only for ap
[modules] only use sim_air_speed if not using NPS

for now...
[fixedwing] gps for nps sim
[fixedwing] cleanup autopilot makefile a bit
[fixedwing] ahrs and ins subsystems for nps target
[nps][fixedwing] updates for fixedwing support in NPS
[nps] Detect nans and exit in JSBSim FDM