[GPS] Add classes to simulate the gps functionning

- GpsSimulationData to describe data supplied by a gps
- GpsSimulationSequence to build and manage a list of gps data
-GpsSimulationSequenc : sample of a flight plan
- Gps3DMock : mock of a gps 3D. the data flow can be controled by an IO
-IGps3d to describe the gps behaviour and separate the behaviour and the
implementation