- deleted unneeded function eta_long (now in Pure/pattern.ML
- added HOL.min / HOL.max to allowed consts again
- added final simplification step with presburger_ss to
preprocessor again
use_thy "FP0";
use_thy "FP1";
use_thy "RECDEF";
use_thy "Rules";
use_thy "Sets";
use_thy "Ind";