px4io driver: publish input_rc even if RC connection has been lost
px4io: do not include failsafe condition into rc_lost flag
rcS: removed unnecessary sleeps, minor code style fixes
mavlink: is_published() fix
Merge pull request #788 from PX4/mavlink_published_fix

mavlink: is_published() fix
commander: don't beep if message is not understood
mavlink: implemented multicasting between mavlink instances (two options: forwarding: forward received messages from self to other mavlink instances, passing: send out messages received from other mavlink intances over serial
Move Pauls EKF into a class and instantiate only when / if needed. Checking for low memory conditions as we should.
Removed a bunch of commented out things that we will not need any more.
Reduced the number of states to 10 to avoid killing the logging system
Bump RC timeout for all cases to half a second
Merge pull request #796 from PX4/rc_timeout_fix

Bump RC timeout for all cases to half a second
Create EKF object in right context
Merge pull request #794 from PX4/estimator_ram_fix

Move Pauls EKF into a class and instantiate only when / if needed.
Merge pull request #795 from PX4/estm_log_fix

Reduced the number of states to 10 to avoid killing the logging system
Proper failsafe handling onboard, including throttle failsafe condition if enabled
Only publish RC inputs if we have seen some valid inputs at some point
Simplify the failsafe handling, reduce 3 params to one
Trigger failsafe action also on failsafe flag
px4io: Allow RC failsafe detection as valid feature