Add 3.15 release branch of gsb_feature_book_ct.
Add 3.11 release branch of gsb_feature_publication_ct.
WP-3818: Add update hooks to remove old fields.
Add 3.16 release branch of gsb_feature_working_paper_ct.
WP-3771: Fix saving content creates draft version.
WP-4076: Remove field_salutation from Book CT.
WP-4076: Delete Salutation field for JABCO.
Add 3.15 tag of gsb_feature_book_ct
Add 3.11 tag of gsb_feature_publication_ct
Add 3.16 tag of gsb_feature_working_paper_ct