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

Instead of trying to keep a vehicle type within the FirmwarePlugin instance, pass the vehicle to the function so it can query the type that way.

Fix parameter write broken by non-ArduPilot component changes

Clean up parameter meta data version methods to match spec

Handle ArduPilot strangeness with respect to components and mavlink spec for parameter messages

Update ArduPilot version to latest releases only

Rework ArduPilot Airfame setup page

Smart RTL support

Add FOLLOW flight mode

Work around quirkiness with ArduPilot and LOITER_* NaN handling on heading.

Copter 3.7 CH#_OPT -> RC#_OPTION name change

ArduPilot for configurable mavlink stream rates