BibAuthority: initial release

• BibAuthority: New module containing utility functions, configuration and tests. Adds demo records and new index tables. Adds HowTo guides for admin and hacking pages. (closes #1602)

• BibIndex: When indexing authority-controlled subfields of bibliographic records, enrich the index with terms from a configurable list of subfield values from the referenced authority record.

• BibIndex: When looking for recently changed bibliographic records to re-index for a given authority-controlled subfield, reindex all bibliographic records that contain references towards recently updated authority records, even if the bibliographic records in questions have not been recently updated.

• BibFormat: Simple HTML for authority record. Links for browsing between dependent authority and bibliographic records.

• Other modules: some modifications in other modules as well.

Co-authored-by: Grzegorz Szpura <grzegorz.szpura@cern.ch>
Signed-off-by: Grzegorz Szpura <grzegorz.szpura@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>