Added the ASSIMP library

Added the files provided for the tutorial
Added the SplitMeshNode and SubMeshNode classes

Graphics2/SplitMeshNode.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "DirectXFramework.h"
+#include "SceneGraph.h"
+#include "SubMeshNode.h"
+
+class SplitMeshNode : public SceneGraph
+{
+public:
+	SplitMeshNode(wstring name, wstring modelName);
+	bool Initialise(void);
+	SceneGraphPointer AddMeshNode(shared_ptr<Node> node);
+
+private:
+	shared_ptr<SubMeshRenderer>		_renderer;
+
+	wstring							_modelName;
+	shared_ptr<ResourceManager>		_resourceManager;
+	shared_ptr<Mesh>				_mesh;
+
+	bool _isInit = false;
+};
+