message: adding back osg loader for volumeViewer
diff: @@ -212,6 +212,9 @@ void VolumeViewer::addGeometry(std::string filename)
  if (fn.ext() == "stl") {
  miniSG::importSTL(*msgModel,fn);
  loadedSGScene = true;
  + } else if (fn.ext() == "osg") {
  +
  + }
  } else if (fn.ext() == "msg") {
  miniSG::importMSG(*msgModel,fn);
  loadedSGScene = true;
  