Merge branch 'master' of github.com:PX4/Firmware into px4io-i2c
Merge branch 'px4io-i2c' of github.com:PX4/Firmware into px4io-i2c
After the mb12xx driver was merged way too early, make the best out of it and fix up the init phase to the driver bails out if there is no sensor connected
Merge branch 'px4io-i2c' of github.com:PX4/Firmware into px4io-i2c
Refactored debug level into proper register, px4io status now correctly reads it. Added more of the missing alarms clear logic, alarms reporting now consistent. Adding missing sign change on mode switch, fixes override issue when attempting to switch to auto mode. Pending outdoor tests