refs #720, improved distributor and airline/livery detection

* mark data read from DB (req. for string key where existing key value is not reliable indicator for DB data)
* detect distributors by part of model string
* use a simplified name (no spaces, no special characters) to find a match
* allow to obtain model strings (=keys) as set and list

src/blackmisc/aviation/livery.cpp

@@ -74,6 +74,11 @@ namespace BlackMisc
             return s;
         }
 
+        bool CLivery::isContainedInSimplifiedAirlineName(const QString &candidate) const
+        {
+            return this->getAirlineIcaoCode().isContainedInSimplifiedName(candidate);
+        }
+
         bool CLivery::setAirlineIcaoCode(const CAirlineIcaoCode &airlineIcao)
         {
             if (m_airline == airlineIcao) { return false; }