libgit2/pygit2 — pull request #413 by carlosmn (2014-08-27 16:32:34+00:00)
Title: Move blame to cffi

This requires fairly little work on the pygit2 side to kick off all the
searching on the libgit2 side, so it's a fairly good candidate.

This changes the return value for the commit ids to Oid instead of
strings, which is what we generally try to return.