multirotor_att_control: use PID lib for yaw rate control
multirotor_att_control: style fixes, cleanup
Startup scripts: Corrected cases where commander was not started, updated several outdated scripts
Startup scripts: Start the commander early and let it try to open the mavlink_fd with 20Hz
Merge pull request #515 from julianoes/startup_fixes

Startup script update
remove commander from hil startup scripts
Merge pull request #517 from thomasgubler/hil_startupscripts

remove commander from hil startup scripts
Startup scripts: fixed stupid typo
Merge pull request #518 from PX4/hotfix_fixedwing_startup

Startup scripts: fixed stupid typo
Hotfix: Be more aggressive about SPI2 init on v1 boards
multirotor_pos_control: failsafe against invalid yaw setpoint in AUTO
missionlib: Added geo.h include, without this the _wrap_pi function returned garbage (e.g. for the yaw setpoint in auto)
Merge pull request #522 from PX4/hotfix_yaw_auto_bug

missionlib: Added geo.h include,
Merge branch 'master' into yaw_pid_fix
Don't limit the PWM output maximum for the IRIS to use the whole thrust range
fix MEAS airspeed and airspeed calibration
Merge pull request #525 from thomasgubler/airspeed_meas_calibration

fix MEAS airspeed and airspeed calibration
mkblctrl startup script changed
Fix user abort behave in test

Now the pwm ouput return to the last value before test (useful and safer when testing ESCs).
Merge pull request #526 from Thiago0B/master

Fix user abort behave in test