Fixed connection loss / failsafe detection, added decoding of two switch channels if IO supports 18 RC channels. Loss is tested, switch channels are not.
Merged master
Merge branch 'sbus_rcloss_fix' of github.com:PX4/Firmware into fixedwing_io_mixing
Merge pull request #122 from PX4/sbus_rcloss_fix

Fixed connection loss / failsafe detection, added decoding of two switches
Merge branch 'master' of github.com:PX4/Firmware into fixedwing_io_mixing