refs #706, callsign to airline plus testing resulting in multiple smaller improvements (refs #707)

* added functions to callsign / callsign list
* used in aircraft matcher
* also resolve std.livery in matcher
* also allow to find aircraft ICAO designator ending with string (e.g. 737 for B737)
* renamed CAircraftMatcher::reverseLookup -> CAircraftMatcher::reverselLookupModel
* threadsafe isInRange (CAIrspaceMonitor)

src/blackmisc/aviation/callsign.h

@@ -110,6 +110,9 @@ namespace BlackMisc
             //! Get the callsign suffix ("TWR", "ATIS" ...) if any ("_" is removed)
             QString getSuffix() const;
 
+            //! Airline suffix (e.g. DLH1234 -> DLH) if applicable
+            QString getAirlineSuffix() const;
+
             //! Suffix such as "_TWR"?
             bool hasSuffix() const;