Added free Clone() function for Nodes

src/node.cpp

@@ -0,0 +1,14 @@
+#include "yaml-cpp/node/node.h"
+#include "nodebuilder.h"
+#include "nodeevents.h"
+
+namespace YAML
+{
+    Node Clone(const Node& node)
+    {
+		NodeEvents events(node);
+        NodeBuilder builder;
+        events.Emit(builder);
+        return builder.Root();
+    }
+}