Much better handling of missing parameters

Working basic mavlink ftp file upload

Adding the ability to add a waypoint.

Refactoring QGCFlightDisplay and Renaming QGCMavManager.*

writeFileAccumulator contents cleared on errors, nack or ack timeout
memcpy used to transfer data to request message buffer

Sorting source and headers while at it.

Added MavManager QML Interface

It does not update anything internally. It just moves the path on the screen.

Initial rendering of Waypoints

New Custom Command Widget

Remove the "Simulate" feature

Singleton screen tools
I will deal with the other PR tomorrow...

New parameter editor

- You can now cancel parameter change
- Tablete friendly