refs #507, changed setup reader and simplied global setup and setup reader

* a single base URL (shared), derived URLs by appended path
* simplified dir structure shared with sub directories
* renamed functions
* automatically synchronize setup with DB when initialized
* trigger download info loading when setup is completed
* allow to automatically read after setup data have been synchronized
* read DB data when setup has been loaded
* allow to reload from threaded reader
* improved handling (log messages, skip reading) when data are not available

src/blackcore/vatsimdatafilereader.cpp

@@ -152,12 +152,11 @@ namespace BlackCore
     void CVatsimDataFileReader::ps_read()
     {
         this->threadAssertCheck();
-        if (m_setup.get().vatsimDataFile().size() < 1) { return; }
 
         // round robin for load balancing
         // remark: Don't use QThread to run network operations in the background
         // see http://qt-project.org/doc/qt-4.7/qnetworkaccessmanager.html
-        QUrl url(m_setup.get().vatsimDataFile().getNextUrl());
+        QUrl url(m_setup.get().vatsimDataFileUrls().getNextUrl());
         if (url.isEmpty()) { return; }
         Q_ASSERT_X(this->m_networkManager, Q_FUNC_INFO, "Missing network manager");
         QNetworkRequest request(url);