shazow/urllib3 — pull request #168 by Lukasa (2013-04-02 19:27:50+00:00)
Title: Content-Type header values should be native strings

In response to the discussion kennethreitz/requests#1252, this PR would ensure that any calculated header key is returned as a native string.

Obviously, feel free to code review this. Let me know if you want me to go about this in a different way, or anything. =)