adopting mutabelle and quickcheck to return timing information; exporting make_case_combs in datatype package for predicate compiler; adding Spec_Rules declaration for tail recursive functions; improving the predicate compiler and function flattening
Syntax.ambiguity_level := 100;
Proofterm.proofs := 2;
no_document use_thys ["Code_Integer"];
use_thys ["Eta", "StrongNorm", "Standardization", "WeakNorm"];