[nps] Started to add fixed wing support in NPS
[rotorcraft] improve in_flight detection heuristic

Simply checks if thrust, speed and acceleration are above a threshold.
Does not rely on RC thrust command anymore, but only on actual thrust command.
Not tested on real vehicle at all so far...

Attempt to improve issue #201 and replaces #468
[nps] A few more NPS for FW updates

 * tweaked FBW for USE_NPS, not SITL
 * Better support for AP or FBW or both
 * added start of a subsystem makefile
[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] minor cleanup
[conf] replace stabilization euler by int_euler in examples
[airframe] add new airframe for Quark plane
[dox] nicer doxygen formatting for pprz_transport
[dfu] Improved progress bar during programming
[boards] krooz_sd: fix I2C1_GPIO_SDA pin
[i2c] fix i2c3 compilation
[modules] add max7456 osd module
[boards] krooz: baro_board.c corrected
[mcu] Added i2c3 initializationto mcu.c

closes #489