[rotorcraft] set guidance_v_zd_sp to zero in altitude hold for visualization
[math] add FLOAT_QUAT_OF_ORIENTATION_VECT
[rotorcraft][guidance][stabilization] quat setpoint fixes

Don't pretend that the commands from guidance_h are actually real euler angles.
Compose a roll/pitch quaternion from simultaneous rotation of roll/pitch,
then rotate around resulting body z-axis to align the heading.

This should "fix" the setpoint passed to the attitude stabilization if in HOVER or NAV
at large angles.
Only tested quickly in simulation...
[rotorcraft] guidance_h: normalize psi sp from nav_heading
[rotorcraft][stabilization] calculate correct yaw from guidance psi setpoint

Instead of using the psi setpoint angle to rotate around the body z-axis,
calculate the real angle needed to align the projection of the body x-axis onto the horizontal plane
with the psi setpoint.
Only makes a few degrees of difference at high roll/pitch angles, but should be correc now.
still needs to be optimized...
[tools] calibration: automatically choose noise_threshold
[ARDrone] LED driver fixed
Merge pull request #517 from fvantienen/superbitrf

SuperbitRF and Lisa/S
[modules] baro_ms5611_spi: fix update macro
[datalink] only include superbitrf if actually used

fixes compilation on ar_drone/omap
[superbitrf] minor include fixes
[omap] add empty gpio_arch.h
[modules] baro_ms5611: don't send MS5611_COEFF by default

to send the MS5611_COEFF message either set BARO_MS5611_SEND_COEFF to TRUE to send it every 5s
or explicitly call baro_ms5611_send_coeff
[modules] add baro_ms5611_send_coeff declaration
[rotorcraft] MODULES_FREQUENCY defaults to PERIODIC_FREQUENCY
[dox] create dox makefile target to easily create doxygen docs
[dox][modules] update sys_mon description
[dox] fix file headers for sensors/baro_ms5611_*
[dox] fix sys_mon module description rendering
[Ardrone] Takeoff without joystick is possible