call django.setup before syncdb for django 1.7 compatibility

`apt-get install python3-django` installs version 1.7.2.
The only change necessary is `django.setup()` before calling `syncdb`, see https://docs.djangoproject.com/en/dev/releases/1.7/#standalone-scripts
(we should still have a look at syncdb later though)

Besides this everything is working - I appreciate the switch to python3!