Create new Django project Athletica
db: adapt to athletica
Create App 'main'
adapt models to actual tables

> python manage.py inspectdb > main/models.py
include app 'main'
update model

> python manage.py makemigrations main
output list of stadions
git: add Emacs tilde ignore pattern
implement stadion index and details
use shortcuts
raise Http404 upon non-existent stadion_id
another shortcut
views: simplify and make consistent
Anlage: add Stadion foreign key
Anlage: adapt detail view
Anmeldung: add Meeting foreign key
admin: have Anlage administered as well
admin: define __str__() and verbose_name_plural
admin: add more models
models: more foreign keys, str() and verbose_name_plural