Intervention tables and model adjustments

* adds user access relation to certain models
* adds pagination to tables
* adds checked_on/_by attributes to intervention model
* adds custom column rendering for checked and registered columns
* adds first simple index filtering of default interventions for user
* adds translations

konova/sub_settings/django_settings.py

@@ -144,7 +144,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 LANGUAGE_CODE = 'en-us'
 
-DEFAULT_DATE_TIME_FORMAT = 'YYYY-MM-DD hh:mm:ss'
+DEFAULT_DATE_TIME_FORMAT = '%d.%m.%Y %H:%M:%S'
 
 TIME_ZONE = 'Europe/Berlin'