Merge branch 'issue-#25' into 'master'

.gitlab-ci.yml

management/templates/management/election.html

management/templates/management/session.html

management/templates/management/spectator_settings.html

management/urls.py

management/views.py

requirements_dev.txt

vote/migrations/0025_session_spectator_token.py

vote/models.py

vote/templates/vote/spectator.html

vote/urls.py

vote/views.py

wahlfang/settings.py