Mavlink terrain protocol support

Remove some more Follow stuff

Remove ArduPilot Follow Me support from Stable

Change follow to work above home altitude only

This adds support for the new ArduSub 3.0 feature of automatically detecting
the thrusters directions and reverting the corresponding motor output if
necessary

Update

Fix ArduPilot VTOL takeoff

This also removes the "dev" sufix as this was breaking a regex
for version detection.

Group parameters with no metadata with the other existing params in the group, not in "Other"

Add missing flight modes

Don't show errors from MAV_CMD_SET_MESSAGE_INTERVAL

Update for 4.0 releases

ArduPIlot Follow Me setup

Fix correct usage of heading value

Stream HOME_POSITION on ArduPilot

Finish up follow me support

Plugin'ized follow me support

Correct description

Enable ArduPilot motor testing

Use firmware version type, not vehicle type

Change to Follow Vehicle since Follow Me is not supported

Add missing flight modes

Remove unused modeCount