error on migrate in the provided example

I just tried to take a look at the example. I cloned the repo, created a new virtualenv (Python 3.4, Django 1.8) and started the example with `python manage.py runserver`… it runs, but I forget to install the migrations. When I tried to apply them with `python manage.py migrate` I get the following error:

`django.db.utils.OperationalError: Problem installing fixture '/home/…/example/project/md/fixtures/initial_data.json': Could not load auth.Permission(pk=1): no such table: auth_permission`

If I run the migrations without fixtures first: `python manage.py migrate --no-initial-data` and after that, run it again with fixtures: `python manage.py migrate` it seems to work. Despite Django raising an warning `RemovedInDjango19Warning` because of the fixtures, it looks like they are loaded fine (got the root user).

But now I get 403 on previews when i hit the button on the example page? Don't know if it's related though.
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Start by reproducing the issue from the provided example with Python 3.4 and Django 1.8, using manage.py migrate and the fixture at example/project/md/fixtures/initial_data.json. Check the separate preview request from the example page, then determine whether migrations complete cleanly and previews no longer return 403.

Written by the indexing model from the issue text.