Plus lots of other cleanup

Add Mission Items to Fly View

Separated Flight map into View and Widget

initial travis-ci

All MavManager functionality now in Vehicle

- Moved all MavManager functionality to Vehicle
- Updated all code to use Vehicle instead of MavManager
- Removed MavManager

Switch to Development 2.8

Restructuring flight map code

Add vehicle indicator to flight display

fix global position display in UAS widget

Signed-off-by: kai <kai@uav-flightresearch.com>

UASManager -> HomePositionManager

Revert "set QGC version from git"

New MultiVehicleManager, Vehicle objects

set QGC version from git

QGC bugfixes 

- MultiVehicleManager is a Qml friendly replacement for UASManager
- Vehicle is a replacement for both UAS and AutoPilotPlugin