* adds token checking to AbstractModelAPIView
* adds user accessibility filtering for intervention API v1
* extends fetch_and_serialize() method to take a dict for db filtering instead of a single field and value
* organizes urlnames into supporting formats like "api:v1:intervention"
* adds new app to project
* adds relation between User model and new APIUserToken model
* adds first implementation for GET of intervention
* adds basic code layout for future extension by having new versions
* adds fake-inherited is_ready_for_publish() method to compensation model (not derived from RecordableObjectMixin) to equalize usage of is_ready_for_publish() usage for all data types (compensation can be checked the same way as intervention, ecoaccount or ema)
* adds abstract is_ready_for_publish method to PublishableObjectMixin which needs to be implemented in subclasses
* adds implementation for intervention model
* adds publishable check to rendering report view
* adds/updates translations
* adds tab titles for compensations
* adds/updates translations
* optimizes identifier generating, so that one-digit months will be converted into two digits
* extends KonovaSSOClient for providing support of propagated user data from sso-server. For longterm, we hope to have this feature directly on django-simple-sso. Further details can be found here: https://github.com/divio/django-simple-sso/issues/67
* adds workaround in case of received WFS exception -> routine waits 1 second and tries to rerun for another time. If this does fail as well, the routine will end without a result
* adds mailto shortcut to contact button in footer for a quick fix
* adds mail sending if shared data is deleted
* adds/updates translations
* refactors recording mails into separate email template folder email/recording
* moves mail sending to celery worker using shared_task in konova/tasks.py
* adds mail sending for shared access given
* adds UserNotification settings checks for mail sending
* adds/updates translations
