Move aircraft matching out of simulator plugins

All model matching will be done simulator independent in
CContextSimulator. The simulator specific part is kept in the model
set.
This also caused the signal modelMatchingCompleted to be renamed to
aircraftRenderingChanged, since the name wasn't accurate anymore.
Both getInstalledModels(), getInstalledModelsCount() and iconForModel()
were removed from the ISimulator interface.

refs #765

src/blackcore/context/contextsimulator.h

@@ -96,6 +96,9 @@ namespace BlackCore
             //! A single model has been matched for given aircraft
             void modelMatchingCompleted(const BlackMisc::Simulation::CSimulatedAircraft &aircraft);
 
+            //! Aircraft rendering changed
+            void aircraftRenderingChanged(const BlackMisc::Simulation::CSimulatedAircraft &aircraft);
+
             //! Emitted when own aircraft model changes
             void ownAircraftModelChanged(const BlackMisc::Simulation::CSimulatedAircraft &aircraft);