doc-src/TutorialI/Overview/ROOT.ML

- enter_thmx -> enter_thms
- improved naming of theorems: enter_thms now takes functions pre_name and post_name
as arguments

use_thy "FP0";
use_thy "FP1";
use_thy "RECDEF";
use_thy "Rules";
use_thy "Sets";
use_thy "Ind";
use_thy "Isar";