trans_paths is transport_paths_FlFr in types/Paths.v
equiv_total_paths is equiv_path_sigma in types/Sigma.v
move ToBeMoved to Fibrations.v
'exp' in ObjectClassifier is 'equiv_precompose' from Equivalences (and isn't needed anyway)
move equiv_induction to types/Universe
ML-style path_rect
'equiv_rect' in Functorish is actually also equiv_induction
transport_arrow_(to|from)const
transport_path_universe_V
simplify proof of transport_exp
simplify proof of paths_rect'
Merge pull request #456 from mikeshulman/fibrations

Integrate stuff from ObjectClassifier with the rest of the library