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.h

@@ -80,6 +80,12 @@ namespace BlackMisc
             //! Get description.
             const QString &getDescription() const { return m_description; }
 
+            //! Get corresponding airline name
+            const QString &getAirlineName() const { return this->getAirlineIcaoCode().getName(); }
+
+            //! Does simplified airline name contain the candidate
+            bool isContainedInSimplifiedAirlineName(const QString &candidate) const;
+
             //! Get fuselage color.
             const BlackMisc::CRgbColor &getColorFuselage() const { return m_colorFuselage; }