style and consistency:

* rename CStatusMessages to CStatusMessageList
* rename NetworkVatlib to CNetworkVatlib
* replace all occurrences of Realname with RealName (correct camel case)
* CSequence method corresponding to CList::append is push_back
* don't compile the qdbuscpp2xml metadata plugin by default
* CAircraftIcao string members always trimmed and capitalized
* added CComSystem::roundTo25KHz
* using epsilon comparison in a couple of places

refs #81

src/blackmisc/avcallsign.h

@@ -61,13 +61,13 @@ namespace BlackMisc
              * Get callsign.
              * \return
              */
-            const QString &asString() const { return m_callsign; }
+            const QString &asString() const { return this->m_callsign; }
 
             /*!
              * Get callsign.
              * \return
              */
-            const QString &getStringAsSet() const { return m_callsignAsSet; }
+            const QString &getStringAsSet() const { return this->m_callsignAsSet; }
 
             /*!
              * \brief Get ICAO code, if this possible