the modal factorization system
prefix O_inverts with redundant "Local"
add ev_equiv tactic to evaluate equiv_compose' etc.
improve lift and lower
comment about universe annotations and cumulativity
add a test for Lift'
Merge pull request #595 from mikeshulman/lift

improve lift and lower
Merge pull request #589 from mikeshulman/modal-factsys

The modal factorization system