message: Setup plane&camera after SG cmd line parsing
  It is possible to add objects via the SG command line, thus changing the
  world bounding box that the plane and camera depend on.
diff: @@ -115,8 +115,6 @@ namespace ospray {
  addLightsToScene(renderer);
  addImporterNodesToWorld(renderer);
  addAnimatedImporterNodesToWorld(renderer);
  - addPlaneToScene(renderer);
  - setupCamera(renderer);
  renderer["frameBuffer"]["size"] = vec2i(width, height);
  renderer.traverse(sg::VerifyNodes{});
  @@ -125,13 +123,17 @@ namespace ospray {
  // last, to be able to modify all created SG nodes
  parseCommandLineSG(argc, argv, renderer);
  - if (debug)
  - renderer.traverse(sg::PrintNodes{});
  -
  // recommit in case any command line options modified the scene graph
  renderer.traverse(sg::VerifyNodes{});
  renderer.commit();
  + // after parseCommandLineSG (may have changed world bounding box)
  + addPlaneToScene(renderer);
  + setupCamera(renderer);
  +
  + if (debug)
  + renderer.traverse(sg::PrintNodes{});
  +
  render(rendererPtr);
  return 0;
  