message: only 'Q' now quits the app, 'q' is too easy to hit by mistake
diff: @@ -589,8 +589,10 @@ namespace ospray {
  case '-':
  motionSpeed /= 1.5f;
  break;
  - case 27 /*ESC*/:
  case 'q':
  + std::cout << "'q' to quit is disabled, use 'Q' to quit instead"
  + << std::endl;
  + break;
  case 'Q':
  exitRequestedByUser = true;
  break;
  