New in-db search and browse of authorities with non-filing-indicator support

New in-db search and browse of authorities with non-filing-indicator support

Upon authority ingest, record simple authority headings for searching,
browsing and sorting.  Respect non-filing indicators, if configured
(configuration is the nfi field on authority.control_set_authority_field).

Provide a full suite of search/browse top/center alpha/rank functions
based on authority tag, bib tag or browse axis at the database layer.

Provide functions to find the main-only and full tag list, and ref-variant
versions of the previously defined functions.

Teach OpenILS::WWW::SuperCat (responsible for RESTful feed-generating
interfaces) to use new OpenILS::Application::SuperCat methods that in
turn use the database methods.  The change should be transparent to
users of SuperCat web APIs.

Carry indicators over from authority main entries to bibs, when applying
them in the marc editor.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>