Bi-directional authority enhanced bib browse

Bi-directional authority enhanced bib browse

This functionality extends the work committed as the following set:

e071eb91a40d3871bc0e0a078b88cfdde7ba3b5e Finish stamping for bib record browser
c7bad82a66554251b8a0f636e629fe98680b7765 Stamping upgrade scripts for bib record browser
32ec20b71540b1230ecc15f1aec95059e044499e Fix problem where basic search bar was flush with left edge of page
256b4d24240332ae3fd2a5cc14b1709c90f18d05 Fix issues with multiple divs having the search-wrapper id.
cfc828d832ecee92478466cd2f4e174c2f4b5c3c OPAC Browse: bugfixes squashed together from LP #1177810
6990fd819c0dae385c3cc7a40d39a0ebed91086c Break up expensive queries, match index to quals
c0dea517395c733b77e8eb219d2c3f43f6098d42 OPAC Browse: some squashed commits from LP #1177810
9d37f6890ce6b591d62972ce3e341cecf7c45535 Fix problem with YYYY.schema.bib-auth-browse.sql.
e710ecbee519d374bcf69b0c535c3f83814c782b Bib record browser with 'see also', etc from linked authority headings
d2f4cac923668ff05854ffc9720cafe514b9b71c Link browse entries to authority record when possible
3eb616e56c82a5106e14f5a446f1d875015db7f0 Inter-authority linking

With this, we enhance the browse method to allow the return of authority-only
terms (that is, main entries not used by a bib record) if the authority record
from which the term comes is linked to another authority record via the
mechanism created by 3eb616e5, and that linked authority record is itself in
use by visible bibliographic records.

In order to accomplish this we:
 * extend normalization of both bib and auth records to allow a custom string
   to be used when joining parts of a term (for instance, joining subject
   components with " -- ")
 * cause authority headings to be including in the unique set of values
   captured by metabib.browse_entry during authority ingest
 * link authority-heading derived browse entries to their authority-indexed
   counterparts
 * extend the metabib.browse() stored procedure (and related) to inspect
   authority-linked browse entries
 * extend bibliographic-visiblity testing to cover those bibliographic records
   in use by remote-linked authority records.
 * generate browse links between headings found to be appropriately linked
   and bibliographically in-use and visible

The addition of this functionality will require, in the least, reingest of
all authority records, and would benefit from reingest of bibliographic
records as well, as ingest has been improved and extended.

Signed-off-by: Mike Rylander <mrylander@gmail.com>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Chris Sharp <csharp@georgialibraries.org>