Move test resources to data directory in test resources. FileStore lists book names, instead of directory paths.
NarrativeSections serializer + test. Fixed model object: private constructor made public.
BookStructure (reduced tagging) serializer + test. Fixed circular method references.
IllustrationTagging serializer + test. Add missing field in Illustration.
Updated javadocs
BookMetadata serializer + test. Necessary fields added to BookText that were missing.