4.0.0 de.digitalcollections iiif-image-api 2.1.0 iiif-image-business-impl jar DigitalCollections: IIIF Image API Library (Business IMPL) de.digitalcollections iiif-image-backend-api de.digitalcollections iiif-image-business-api de.digitalcollections iiif-image-model-impl org.slf4j slf4j-api org.springframework spring-context