Add type hinting. Standardize entity tests.
Add classes and properties directly on vocabulary entity.
Import RDF vocabulary using ORM, not the API.
Remove redundant transaction.
Establish bidirectional association between override sets and classes.
Add orphan removal to override sets.
Add tests.
Sync property override and its set. Add tests.
Sync property, class, and vocabulary. Add tests.
Sync resource and values. Add tests.
Remove bidirectional association between property and value. Cascade on delete.
Only items may be assigned to a site.
Keys have owners.
Sites can be owned.
Add bidirectional associations to User.
Merge branch 'orm_optimize' into develop
Update composer lock file.