adding genuine flag to predicate_compile_quickcheck and prolog_quickcheck (cf. 5e46c225370e);
adjusting smart quickcheck compilation to new signature of exhaustive generators (cf. 1f5fc44254d7);
By chapter:
chapters 1 and 2, maybe 3: Peter White
chapters 6, 7 and 8: David von Oheim
chapter 6, maybe 8: Gerwin Klein
chapters 3, maybe 4: Tanja Vos
chapters 1-3 at least: Stefano Bistarelli