- Respect the VUFIND_LOCAL_CACHE constant.
- Resolves VUFIND-1234.

- Group holdings by holdings ID and location by default to accommodate a situation where the items under a single holding have multiple actual locations. This will not change anything in the more common case where there is a 1:1 correspondence between these values.

- Adds new LocalFile cover image method for retrieving files from disk
- Adds support for file:// URLs to cover loader
- Adds recordid and source parameters to thumbnail URLs
- Resolves VUFIND-1137

- Simplify markup
- Make thumbnail display in account screens more consistent and configurable

- Maintains functionality while eliminating the need to add xhprof_lib to the PHP include path.

- The cart can now operate without the need for checkboxes and bulk buttons (this is now the default behavior); this makes mobile view more usable, among other things. The legacy interface is still available by turning off the bookbagTogglesInSearch  setting.

- Disabling is NOT recommended, but may be necessary for some server configurations.

- Added option to only check for duplicate holds at the item-level rather than the bib-level.
- Added a missing translation for hold_record_already_on_loan.

- Information regarding subject type and source can now be returned and exposed through the search API.

- Limit the Voyager barcode statuses allowed to login by default so that e.g. lost card cannot be used anymore. Accepted statuses can be configured via the ini file.

- Switched from ”default” to ”defaultField” in search api record field yaml specification since ”default” has a meaning in Swagger.
- Fixed some minor issues with the Swagger spec.
- Switched to ”vufind.” prefix for VuFind specific fields in search api record field yaml specification to avoid any future conflicts with Swagger fields.

- Move block checking to higher-level code for simplicity/consistency
- Expose public method for blocking requests so message can be displayed to user
- Show account blocks on profile/checkedout screens.