Fixed withCurrentRepo examples

Consider "refs/*/" path prefixes when resolving 'Revision's

Fix listRefs

Update patience

Would loop indefinitely when passed a 'LocalPath' containing forward slashes.

e.g. resolve "refs/heads/master", resolve "refs/tags/v0.42"

The previous versions had two major errors: One parse error and one ambiguous type error.

Fix typo

Minor documentation tweaks to the .cabal file