New VehicleLinkManager implementation

Landing Pattern: Loiter to alt optional support

New standalone mission editor unit test

Component Information FTP download support

More work on vehicle connect state machine(s)

Remove unused FlightGear stuff
More work
More
More
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Windows build updates
Linux fixes
Fix unit test run directory

Remove unused FlightGear stuff

FW Landing Pattern: Support for stop photo/video. Plus item unit test.

Also hand carried text to speech changes from Stable to master. Plus
unit tests for that.

Need to hand carry some stuff from Stable to master in order to fix

This reverts commit ac73682a.

Fixed all the bugs the new tests found

This makes VehicleComponents reusable from core plugin without
requiring override of prerequisiteSetup

* enable TCPLinkTest
* enable FileManagerTest

Plus new unit tests

Also additional major Mission usability changes