project: added project skeleton

Skeleton includes emtpy implementations of application class structure.
Source groups were added to CMakeLists to define filters in Visual Studio.

src/lib/ApplicationSettings.cpp

@@ -0,0 +1,21 @@
+#include "ApplicationSettings.h"
+
+std::shared_ptr<ApplicationSettings> ApplicationSettings::s_instance;
+
+std::shared_ptr<ApplicationSettings> ApplicationSettings::getInstance()
+{
+	if (!s_instance)
+	{
+		s_instance = std::shared_ptr<ApplicationSettings>(new ApplicationSettings());
+	}
+
+	return s_instance;
+}
+
+ApplicationSettings::ApplicationSettings()
+{
+}
+
+ApplicationSettings::~ApplicationSettings()
+{
+}