Ref T709, added XSwiftBus settings class als based on the same Qt free base class

In order to compile included the cpp file

src/xswiftbus/settings.cpp

@@ -0,0 +1,30 @@
+/* Copyright (C) 2019
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution. No part of swift project, including this file, may be copied, modified, propagated,
+ * or distributed except according to the terms contained in the LICENSE file.
+ */
+
+// include whole code in this translation unit, as this code is used on swift/and XSWiftBus side
+// BLACKMISC_EXPORT cannot be used
+#include "blackmisc/simulation/settings/xswiftbussettingsqtfree.cpp"
+
+#include "settings.h"
+#include <string>
+
+using namespace BlackMisc::Simulation::Settings;
+
+namespace XSwiftBus
+{
+    CSettings::CSettings() : CXSwiftBusSettingsQtFree()
+    {
+        // void
+    }
+
+    CSettings::~CSettings()
+    {
+        // void
+    }
+} // ns
+