Fixed #12880 -- Added some missing sphinx directives for module references....

Fixed #12880 -- Added some missing sphinx directives for module references. Thanks to psagers for the report, and timo for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12559 bcc190cf-cafb-0310-a4f2-bffc1f526a37