The parallel of Implementation.thy, i.e. ExtGG.thy has been updated. And some errors in
CpsG.thy have also been corrected.
(*show_question_marks := false;*)
no_document use_thy "../CpsG";
no_document use_thy "../ExtGG";
no_document use_thy "~~/src/HOL/Library/LaTeXsugar";
quick_and_dirty := true;
use_thy "Slides1"