Re-enable predicate subtyping, reversing commit 8f9f549 (needed for Kind integration)
fix for lambdas in relation to subtypes
lambda-related fix
subrange-related fix
new --tear-down-incremental mode
more statistics, for narrowing down incrementality slowdown
Fix to bug 497: make ITE cache context-dependent.
better arith error in case of nonlinear while in linear logic