Django-entity

The is_type filter returns True if there are no arguments

Renamed the cached_relationships function to cache_relationships

Updated API to change intersect_super_entities to has_super_entity_subset

Added additional filtering capabilities on django entity

jsonfield was added as a requirement for django entity for proper installation

This release adds the ability to turn on and off entity syncing

It also allows the user to run the sync_entities management command with an async option. async=True will use celery to sync entities