export hit.Connectedness from HoTT
Merge pull request #529 from mikeshulman/importconn

export hit.Connectedness from HoTT
Teach coqdep not to look at HoTT on making stdlib

This silences the warnings about duplicated files.
Merge pull request #530 from JasonGross/fix-warnings

Teach coqdep not to look at HoTT on making stdlib
Fixed False_hp, added Negation_hp and Bool_to_hProp
Removed Bool_to_hProp due to error
added is_true : Bool -> hProp
trailing newlines removed, Negation_hp simplified