* Added support for returning status codes from checkRequestIsValid / checkStorageRetrievalRequestIsValid / checkILLRequestIsValid instead of just a boolean, with the old boolean style still supported.
- Made Demo driver always return the new-style array and occasionally return different messages for request validation failures.
- Removed the now-unused blocked* actions.

- 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.

- Handle purchase history separately from text fields since it's different. 

- Fixed Voyager "no items" status and holding grouping to always use MFHD_ID as the group key with a prefix to make sure the MFHD_ID is never mixed with a proper ITEM_ID.
- Also added missing RETURNDATE field placeholder in getHoldingNoItemsSQL()

- 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

- Changes EbscoEdsApiException to inherit from BackendException so that it can be caught while letting any other exceptions propagate. Other backends seem to already return BackendExceptions.

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

- Includes bug fix to extended range displays (when activating multiple ranges, the alignment and formatting of some controls could become incorrect).

- EDS apparently returns error 135 when access to the database indicated by record’s ID is not allowed. Treat it like the requested record wasn’t found.

- Use error description as the basic exception message so that it is displayed in the exception view in development mode (i.e. $exception->getMessage() returns something instead of an empty string).

- Resolves VUFIND-218

- Fixes view.phtml to display the translated name for the view in title and display the title for selected view also when hovering over the text part.

- Return properly formatted results from SolrDefault::getRealTimeHoldings to avoid notices in holdingsils.phtml.
- Probably only an issue when Site->hideHoldingsTabWhenEmpty = false.

- Using max int as the rows parameter may cause an int overflow in Solr internal processing at least with a sharded index.