message: add plane by default again until csafe volume bug is fixed
diff: @@ -31,7 +31,7 @@ using namespace ospray;
  std::vector<std::string> files;
  std::string initialRendererType;
  -bool addPlane = false;
  +bool addPlane = true;
  bool debug = false;
  bool fullscreen = false;
  bool print = false;
  @@ -40,8 +40,8 @@ static inline void parseCommandLine(int ac, const char **&av)
  {
  for (int i = 1; i < ac; i++) {
  const std::string arg = av[i];
  - if (arg == "-p" || arg == "--plane") {
  - addPlane = true;
  + if (arg == "-np" || arg == "--no-plane") {
  + addPlane = false;
  } else if (arg == "-d" || arg == "--debug") {
  debug = true;
  } else if (arg == "-r" || arg == "--renderer") {
  