* change get_restricted_data and get_projector_data to always use a list
* Add typings to all get_restricted_data and get_projector_data methods
* Replace CollectionElementList with a real list
* Fixed arguments of inform_deleted_data
* Moved CollectionElementCache to cache.py and refactored it
* Run tests with cache enabled (using fakeredis)
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
* Second websocket channel for the projector
* Removed use of projector requirements for REST API requests.
Refactored data serializing for projector websocket connection.
* Refactor the way that the projector autoupdate get its data.
* Fixed missing assignment slide title for hidden items.
* Release all items for item list slide and list of speakers slide. Fixed error with motion workflow.
* Created CollectionElement class which helps to handle autoupdate.
- Used raw SQL for createing default projector during inital migration.
- Removed default_password and hidden agenda items from autoupdate data for some users.
- Removed old get_collection_and_id_from_url() function.
- Fix socket error in autoupdate (Check if socket exists)
- Add missing translation string for core permission
- Fix KeyError in extract_default_password function in users/views.py
- Improve Pagination. Fix users list for users without can_see_extra_data permissions.
- Limit the number of users in ui-select field
- Fix csv header names in users import help text.
- Use config options (enable logo/title) on projector.
- Nicer font style for main and sub items on agenda slide.
- Fix JS error if this.groups is undefined for anonymous.
- Reset password from current (unsaved) value of default_password.
- MotionForm, AssignmentForm and UserForm factory for open ngDialog.
Fixes edit url redirect problem.
- Added back-to-detail-view-button to list of speakers view.
- Add translation context.
- Fixed (missing) translation strings.
- Fixed tags and category list views.
- motion detail: Use select box for changing state.
- motion slide updated
