Yelp/mrjob — pull request #678 by irskep (2013-07-26 22:40:32+00:00)
Title: Update CHANGES.txt with info about #634

Would have just committed it but I wanted to make it clear that I added the `v0.4.1-dev` section at the top for the next version that we should keep up to date.

Anything else I should add given recent merges?