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/vatsimbookingreader.cpp

@@ -41,7 +41,7 @@ namespace BlackCore
     {
         this->threadAssertCheck();
         Q_ASSERT_X(this->m_networkManager, Q_FUNC_INFO, "No network manager");
-        QUrl url(m_setup.get().vatsimBookings());
+        QUrl url(m_setup.get().vatsimBookingsUrl());
         if (url.isEmpty()) { return; }
 
         QNetworkRequest request(url);