message: Add option for texshop
diff: @@ -675,6 +675,7 @@ void MakeSlides ( TString period, TString pass, TString triggerList, TString aut
  trigList = triggerList.Tokenize(",");
  outFile.open(texFilename);
  + outFile << "% !TEX pdfSinglePage" << endl; // Useful for texshop
  outFile << "%TriggerList=" << triggerList.Data() << endl;
  MakePreamble(outFile);
  BeginSlides(period,pass,authors,outFile);
  