Slightly reworked IO internal failsafe, added command to activate it (px4io failsafe), does not parse commandline arguments yet
Merge branch 'master' of github.com:PX4/Firmware into failsafe_io
Set default failsafe value to 0 of mixer
Set unknown channels to zero, since centering them is a slightly dangerous guess
More safety added by disabling pulses
Merge branch 'master' of github.com:PX4/Firmware into failsafe_io
Better error handling for too large arguments
Merge pull request #288 from PX4/failsafe_io

Better failsafe on IO (if FMU and IO fail)