- eliminated thin_leading_eqs_tac
- gen_hyp_subst_tac now uses asm_lr_simp_tac instead of asm_full_simp_tac,
in order to avoid divergence of new simplifier
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