BUG FIXES
* Update directory detection for `get_unstaged_changes` for Python 3.
(Boris Feld, 684)
* Add a basic ``porcelain.clean``. (Lane Barlow, 398)
* Fix output format of ``porcelain.diff`` to match that of
C Git. (Boris Feld)
* Return a 404 not found error when repository is not found.
* Mark ``.git`` directories as hidden on Windows.
(Martin Packman, 585)
* Implement ``RefsContainer.__iter__``
(Jelmer Vernooij, 717)
* Don't trust modes if they can't be modified after a file has been created.
(Jelmer Vernooij, 719)