Add hOCR functionality (#1006)
* Add hOCR functionality
* Fix wording in Islandora IIIF View Style config form.
* Islandora IIIF: Attempt to fix broken config schema.
* Islandora IIIF: Remove labels from config schema.
* Islandora IIIF: Add labels to config schema items.
* Update IIIFManifest.php
* Move to memorized term lookup, instead of polluting method call.
* Deal explicitly with URIs, instead of attempting to put the entity in config.
* hocr Islandora IIIF: Add missing null check.
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Co-authored-by: Alexander O'Neill <alexander@born-digital.com>
Co-authored-by: Alexander O'Neill <aloneill@gmail.com>
Co-authored-by: Rosie Le Faive <lefaive@gmail.com>
Co-authored-by: Adam Vessey <adam@discoverygarden.ca>
Joe Corall
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