Fixed #5516 -- Added the ability for applications to define their own...

Fixed #5516 -- Added the ability for applications to define their own management commands. Pieces of this patch taken from a contribution by Todd O'Bryan. Thanks Todd.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6400 bcc190cf-cafb-0310-a4f2-bffc1f526a37