allow headers in commit messages

[stevekrouse]

Given that I want to write markdown based commit messages in my commit log, this is a problem that will need to be addressed: https://stackoverflow.com/questions/2788092/start-a-git-commit-message-with-a-hashmark

[stevekrouse]

It's as simple as git commit --cleanup=verbatim and then just deleting everything but the message.