* Altitude control code shared
fewer debugs
subtract D
* remove #include comments, simplify coding, restructuring
thanks JP and MH
* fix cms limits for throttle control
* Use altitude_control debug, fix throttle calculation
minor refactoring
* use AUTO_CONTROL_ALTITUDE debug in place of GPS Rescue throttle pid
* use autopilot for position control names
* fixes from reviews - thanks
* Re-organise included files and functions thanks Karate
* missed init and other typos
* remove old unused unit test file, tidy up thanks Mark
* fix indentation on one line