Many thanks to gabrielhurley for putting most of this together. Also to
bmihelac, arthurk, qingfeng, hvendelbo, petr.pulc@s-cape.cz, Hraban for
reports and some initial patches.
The patch also contains some whitespace/PEP8 fixes.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@13980 bcc190cf-cafb-0310-a4f2-bffc1f526a37