Remove unneeded header and commented out dead code from MEAS airspeed driver
Merge branch 'master' of github.com:PX4/Firmware
Merge branch 'master' into rc_status
Fix printing of IO status
Fix docs header
Add flag to indicate proper RC mapping
Fix S.BUS decoder to return value even if its just failsafe
IO status printing improvements / fixes
Differentiate between failsafe having kicked in (which stops the normal output mixing based on RC outputs and prevents unwanted control commands due to failsafe) and a true loss of the receiver, where we stop outputting RC channel readings downstream on FMU.