Merge branch 'extract-live-settings' into 'master'

src/strass/live_settings/__init__.py

src/strass/live_settings/admin.py

src/strass/live_settings/context_processors.py

src/strass/live_settings/forms.py

src/strass/live_settings/migrations/0001_initial.py

...settings/migrations/0002_create_group_settings_changer.py

...trass/live_settings/migrations/0003_auto_20200311_1037.py

...ss/live_settings/migrations/0004_alter_livesettings_id.py

src/strass/live_settings/migrations/__init__.py

src/strass/live_settings/models.py

src/strass/live_settings/templates/admin/index.html

src/strass/live_settings/tests.py

src/strass/live_settings/tools.py

src/strass/live_settings/urls.py

src/strass/live_settings/views.py

src/strass/requirements.txt