Merge branch 'master' into mpc_rc

.gitignore

src/drivers/airspeed/airspeed.cpp

src/drivers/airspeed/airspeed.h

src/drivers/ets_airspeed/ets_airspeed.cpp

src/drivers/hmc5883/hmc5883.cpp

src/drivers/meas_airspeed/meas_airspeed.cpp

src/lib/launchdetection/CatapultLaunchMethod.cpp

src/lib/launchdetection/CatapultLaunchMethod.h

src/lib/launchdetection/LaunchDetector.cpp

src/lib/launchdetection/LaunchDetector.h

src/lib/launchdetection/LaunchMethod.h

src/lib/launchdetection/launchdetection_params.c

src/lib/launchdetection/module.mk

src/modules/mavlink/mavlink.c

src/modules/mavlink/mavlink_main.cpp

src/modules/mavlink/mavlink_main.h

src/modules/mavlink/mavlink_receiver.cpp

src/modules/sensors/sensors.cpp