See discussion here:
https://github.com/ArduPilot/ardupilot/issues/7331
we were getting some uninitialised variables. While it only showed up in
AP_SbusOut, it means we can't be sure it won't happen on other objects,
so safest to remove the approach
Thanks to assistance from Lucas, Peter and Francisco
This commit includes an example program to
run the code of AP_Marvelmind class.
It also includes a dump from the marvelmind
serial as well as a script that injects
this dump into the example for demonstration.