Comparing notions of equivalence (with some other minor changes)
some more hints for working with typeclasses
Added notation [g o f] for composition.
Merge pull request #84 from mikeshulman/eqvar

Comparing notions of equivalence (with some other minor changes)
Merge branch 'master' of https://github.com/HoTT/HoTT
Incorporated [g o f] notation into EquivalenceVarieties.
Merge branch 'pull-request-2' of https://github.com/DanGrayson/HoTT into upstream

Conflicts:
	theories/Equivalences.v