staged record loader: add various authority record actions

staged record loader: add various authority record actions

--action stage_auths          - load MARC authorities into staging
                                table
--action match_auths          - identify matches with authority
                                records already present in the
                                Evergreen database; matching is
                                based on LCCN, cancelled LCCN, and
                                main heading.
--action load_new_auths       - load new (unmatched) authorities
--action overlay_auths_stage1 - overlay based on LCCN where
                                heading has not change; this step
                                disables propagation to bib records
--action overlay_auths_stage2 - overlay based on LCCN where heading
                                has NOT changed; propagates changes
                                to bib records
--action overlay_auths_stage3 - overlay for records where a cancelled
                                LCCN is replaced with a new one
--action link_auth_auth       - run authority_authority_linker.pl for
                                the authorities that were overlaid
                                or added in this batch.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>