Also split them into unit and functional tests.

Trying to access the dashboard index page directly used to
redirect the user that are not logged in to the '/admin/'
login page instead of the Oscar login.
I implemented a new decorator ``staff_member_required`` that is
based on the one provided in ``django.contrib.admin`` and the
``redirect_to_login`` decorator in ``dango.contrib.auth``. It
redirects the user to the '/accounts/login/' page an uses the
``next`` GET parameter to redirect the user back to the
dashboard index page after successful redirect.

It handles the situation where there is no profile model too, and
dyncamically builds a profile and user form