Fix classname (simple => repomgmt::simple) and add missing default args.
One further fix for simple.pp: last patch corrected the path, but did
not correct the name (Ubuntu Precise's python-django package creates
/usr/bin/django-admin, not /usr/local/bin/django-admin.py).
Removed apparently superfluous pip installation of "django-south" which
apparently does not exist.  We install "south" a few lines later, so this
appears to be accidental.
Revert path to django-admin.py to the one used by the pip installation
of Django, not the one used by the Ubuntu package of python-django.
Merge pull request #8 from markvoelker/master

Fixed class name and missing default args in simple.pp