Sebastian Vetter
c426e57273
makes Oscar work with aware AND naive datetimes based on USE_TZ
* replaces all occurences of ``datetime.now()`` with
``django.utils.timezone.now()`` which returns aware or naive
datetimes based on ``USE_TZ``
* increases ``South`` version to 0.7.6 in dependencies to make
aware datetimes work in migrations.
* Oscar's sandbox is now configured to use aware timezones by
default