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/avaircraftsituation.h

@@ -15,7 +15,6 @@
 #include "avheading.h"
 #include "pqspeed.h"
 #include "valueobject.h"
-#include <QDateTime>
 
 namespace BlackMisc
 {
@@ -50,7 +49,6 @@ namespace BlackMisc
                 : m_position(position), m_altitude(altitude), m_heading(heading), m_pitch(pitch), m_bank(bank), m_groundspeed(gs),
                 m_timestamp(QDateTime::currentDateTimeUtc()) {}
 
-
             /*!
              * \brief Properties by index
              */