Django 1.4.0 => 1.4.3, gunicorn => 0.17.2

Tests pass.  gunicorn change logs don't indicate
any API breakage.

http://docs.gunicorn.org/en/latest/2012-news.html
and
http://docs.gunicorn.org/en/latest/2013-news.html
Merge pull request #58 from guaq/topic/django-1-4-3-and-gunicorn-0-17-2

Django 1.4.0 => 1.4.3, gunicorn => 0.17.2