message: Added deprecation note to render/opencv/draw_utils.hpp's draw_wireframe(...)
  We might likely deprecate this function in the future to keep the core of eos free of OpenCV.
  It would be good to benchmark our own implementation first and test it a bit more.
diff: @@ -40,6 +40,9 @@ namespace render {
  *
  * It does backface culling, i.e. draws only vertices in CCW order.
  *
  + * Note: This function might be deprecated in the future, in favour of draw_wireframe(...) in
  + * render/draw_utils.hpp, which doesn't depend on OpenCV anymore.
  + *
  * @param[in] image An image to draw into.
  * @param[in] mesh The mesh to draw.
  * @param[in] modelview Model-view matrix to draw the mesh.
  