Adding new files to register objects that require to be notified when resolution changes.

Also added a structure that holds the resolution and the current scaling ratio.

src/sizenotifiable.cpp

@@ -0,0 +1,8 @@
+#include "sizenotifiable.hpp"
+
+namespace cloonel {
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void SizeNotifiable::NotifyResChanged (const SizeRatio& parSize) {
+	}
+} //namespace cloonel