Refs #5943, #6107 -- Added framework and tests to check for the correct operation of django-admin and manage.py. Thanks for Simon Willison and Karen Tracey for their contributions and assistance testing this patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7876 bcc190cf-cafb-0310-a4f2-bffc1f526a37