Ref T412, Ref T227, own aircraft positions and state detection

* keep history of own positions
* detect moved aircraft
* relay signals via proxy

src/blackcore/context/contextownaircraft.h

@@ -102,9 +102,18 @@ namespace BlackCore
             //! Own pilot (aka the swift user) changed
             void changedPilot(const BlackMisc::Network::CUser &pilot);
 
+            //! Changed aircraft model
+            void changedModel(const BlackMisc::Simulation::CAircraftModel &model);
+
             //! Aircraft has been moved from one location to another (changed scenery)
             void movedAircraft();
 
+            //! Just airborne
+            void airborne();
+
+            //! Just landed
+            void touchdown();
+
         public slots:
             //! Get own aircraft
             virtual BlackMisc::Simulation::CSimulatedAircraft getOwnAircraft() const = 0;