- [ardrone] added daren's mag freeze fix
 - [ardrone] daren's mag freeze fix, cleaned up acc. to suggestions
Merge branch 'master' of https://github.com/paparazzi/paparazzi into ardrone_mag_freeze
[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 pull request #767 from x75/ardrone_mag_freeze

[ardrone] added daren's mag freeze fix
[ardrone] use gpio API instead of system call
[mission] add support of rotorcraft to the  mission control module
[invariant] invariant filter less verbose by default