Code review comment for lp:~widelands-dev/widelands-website/django1_11

Here instructions how to update (just in case i can't do that, and of course also as a reminder for myself ;) ):

1. activate the virtualenvironment
2. shut down the website (and activate the maintenance view)
3. make a backup of the database
4. run 'pip install -U pip setuptools'
5. merge this branch
6. There will be a conflict: Remove the folder 'tracking' and 'resolve --all'
7. delete remaining '*.pyc' files
8. run './manage.py migrate --fake-initial' (faking initial because of wlscreens)
9. deactivate maintenance view and start the website again
10. pray

If all is working:
11. Commit the changes and push
12. optionally drop the database tables related to tracking called: tracking_bannedip, tracking_untrackeduseragent, tracking_visitor