- Relying on APPLICATION_ENV is simpler.

- This allows embedding to work more consistently, even though the user experience is not the best.

- Use cursorMark for fetching IDs in sitemap generator search mode (faster for large indexes).
- Simplify code to better separate retrieval mode-specific logic.
- Change default retrieval mode to "search" since "terms" may not behave as expected in some situations (e.g. when hidden filters are applied).

- See also VUFIND-1308

Signed-off-by: Stefan Weil <sw@weilnetz.de>

- Add mechanism to load links by AJAX based on DOI.
- Implement data provider using BrowZine API.

- Use SSL endpoint URL and version 2 in default configuration.
- Retain version 1 as default in code for backward compatibility.
- Resolves VUFIND-1225.

- Adds support for doing the same with other drivers too.

- Includes Alma-specific authentication module and controller for handling webhooks.
- Resolves VUFIND-1212.

- More logical separation of concerns
- Fixes compatibility with Search2 backend

- Make it possible for non-logged in users to get access to EZproxy e.g. based on IP address.
- Make it possible to disable passing of user's username to EZproxy with the ticket.
- Add logging of successful login requests.

- A new config.ini setting allows the user to specify which search backends contain ILS records.
- SolrMarcFactory has been replaced with IlsAwareDelegatorFactory to make composing the trait with other classes easier.

- Refactored/simplified code for clarity.
- Added logic to take better advantage of see-also references.

- Resolves VUFIND-1241.

- Move facet caching logic out of controllers.
- Introduce a new plugin manager for facet caches.
- Standardize Summon facet cache logic to more closely match Solr; add HomePage support and fix broken functionality.

- Multiple configurable layouts are now available.
- Template code has been significantly refactored/simplified.