Adds airspeedTarget and altitudeTarget indicators.
Improvements to the Yaw axis on the HUD.
Extracting HUD to a fragment class.

Issue #8
Extracting FlightData Map to a fragment class.

Issue #8
Extracting Planning Map to a fragment class.
Bug fix, objet was not initialized on last commit.
Flight data screen with dual screen, holding the HUD and flightMap at the same time.
Temporary fix for the heap problem caused by moving the drone marker.
If disconnected hide the drone on flightData.
A way to rotate the drone icon, without using too much memmory.
Extracting GCP map to a fragment.
Now offline maps can be used by extending the offlineMapFragment class.
All maps now have the offline option.

Closes #11