New: Add 'name' property to dir_container.
Mod: Change 'link_id' of dir_role to 'link'.
New: Add 'roles' property to dir_link.
New: EntityMetadata property for dir_container category: parent/child.
New: ctools content_types plugin: dir_container_category_parent.
New: ctools content_types plugin: dir_container_category_children.
New: EntityMetadata property for dir_container: links.
New: Ctools content_types: dir_container_links.