Fixed Model Matrix Not Working

Was caused by copying the batch instead of using the correct format
of using a reference

OpenGLEngine/MyBuiltinCubeScene.h

@@ -15,5 +15,5 @@ public:
 private:
 	BasicRenderable m_shape;
 	Camera2D m_camera;
-	BasicBatch m_batch;
+	BasicBatch& m_batch;
 };