"Never be clever for the sake of being clever." Glenn Gould

The type-checking benefits of separation of the ity and region types
are more important than the weight of extra functions to manipulate
a second type.

these generalize numerous type-specific X_all and X_any functions.
These are now defined as [Util.all X_fold] or [Util.any X_fold].

moved from map.why to bv.why + new theories BV31, BV63, and BV64
modules mach.int.Int32 etc. now have to_bv / of_bv routines
ocaml driver identify integers and bit vectors and makes use of
operations such as land

(no yet displayed in IDE)

Induction_pr performs induction on the leftmost application
of some inductive predicate in the goal.

This can be overriden by attaching the label "induction"
on such an application. In this case, any unlabeled application
will be ignored.

Inversion_pr works similarly, excepted that it does not generate
inductive hypotheses, but simply inverses inductive predicate.
In this case, the label "inversion" will be used.