libgit2/libgit2sharp — pull request #151 by redoz (2012-05-15 12:18:08+00:00)
Title: Exposed git_merge_base as CommitCollection.GetCommonAncestor(...)

In order to make this work, I had to update libgit2 (to 54695f4098c75801f477f5bc229a52653484e08a)
When I did that I had to rename git_lasterror to giterr_last. I also had to edit some of the error codes to make sure they matched the codes given in errors.h.