adding function generation to SmallCheck; activating exhaustive search space testing

adding dummy definition for Code_Evaluation.Abs and hiding constants App less strict

generalized ensure_random_datatype to ensure_sort_datatype

renaming quickcheck generator code to random

ported sledgehammer_tactic to current development version

adding dependencies to IsaMakefile; adding sledgehammer_tactic in Mirabelle_Test

adding files to use sledgehammer as a tactic for non-interactive use

adding birthday paradoxon from some abandoned drawer

adding extensional function spaces to the FuncSet library theory

tuned