Added surface selector, made faces reflect G3D faces

src/include/DataModelV2/PartInstance.h

@@ -50,6 +50,7 @@ public:
 	void setSize(Vector3);
 	void setShape(Enum::Shape::Value shape);
 	void setChanged();
+	void setSurface(int face, Enum::SurfaceType::Value surface);
 
 	//Collision
 	bool collides(PartInstance * part);