[boards] lisa_m: AF remap for PWM using TIM3
[rotorcraft] fix stabilization_attitude_ref_idx_set_omega_*
[rotorcraft] guidance_v: limit z_ref in update_ref_from_zd_sp

Limit the gv_z_ref to GUIDANCE_V_REF_MAX_Z_DIFF (default 2m) from current z position.
This should be useful if the aircraft can't follow the alitude in climb mode (e.g. when limited by max throttle).
[ground_segment] server: fix kml export
Merge branch 'master' into x75
Merge branch 'master' of https://github.com/paparazzi/paparazzi into x75
 - aspirin wait for 2 seconds for hmc5883 to boot / mag oneshot
 - linux cross makefile for ardrone from master