(Type u) is the old (Type (u+1))
(PType u) is the old (Type u)
Type* is the old (Type (_+1))
PType* is the old Type*
The stdlib can be compiled, but we still have > 70 broken tests
See discussion at #1341
It also updates the condition for triggering the inaccessible
transition. Before this commit, we would only perform this kind
of transition if *all* terms were marked inaccessible. Now,
we perform it if *some* are marked inaccessible. Reason:
when we perform the complete transition we don't have enought
information for deciding whether an argument should be marked as
inaccessible or not. If this decision creates confusion for users,
we may try to mark them with an "maybe-inaccessible" annotation, and
then enforce that the inaccessible transition is performed onlty if
*all* terms are marked as inaccessible or *maybe-inaccessible"
