Camera brand/model support. Use canonical camera names in Plan files.

Major rework to support terrain profile display and terrain collision reporting

Survey And Corridor now share same transect generation code. Better unit tests for both with more coverage.

Mavlink terrain protocol support

Rework complex distance, camera shot count calc for better back compat

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

And fixes they found