* Activate restricted_data_cache on inmemory cache
* Use ElementCache in rest-api get requests
* Get requests on the restapi return 404 when the user has no permission
* Added async function for has_perm and in_some_groups
* changed Cachable.get_restricted_data to be an ansync function
* rewrote required_user_system
* changed default implementation of access_permission.check_permission to
check a given permission or check if anonymous is enabled
- remove motion version
- migrations for versions and change recommendations
- Redone motion comments. Wording changed from comment fields to comment
sections
- fixed test order, tests are not atomic
- introduce get_group_model. Just use OpenSlides Groups and not the
django's ones.
* geis does not work with channels2 and never will be (it has to be python now)
* pytest
* rewrote cache system
* use username instead of pk for admin user in tests
Also fixt the case, where an anonymous user connects to the websocket connection.
Also added a function anonymous_is_enabled() to see, if the anyonmous user is enabled.
Added pip freeze to travis to see installed versions.
* Add caching support to users/group
* Add a function has_perm that works with the cache.
* Removed our session backend so other session backends (without the database) can be used
