- Switch to openrobots2-idl
- Reset imu values to NaN in case of timeout, to clean log files
- Measure effective sensor rate and refuse to servo() if below 80% of the desired rate. Also log the measured rate in the log file
- Don't scale input twice during startup ramp
- Actually send only non-NaN rotors velocities (saves bandwidth)
- Improve motor startup, by resending startup message in case it was lost
- Print unknown flight controller messages on stderr.