Initial commit of exam_paper model and spec
Moved add_subject_topic to mods_metadata_methods
ExamPaper#apply_additional_metadata and specs
Upgraded Hydra-Head to 6.3.1, fixed failing tests
WIP: GenericContent - Compound behaviour
Updated GenericContentBehaviour to match original spec and added tests
Fix permission spec issue
ExamPaper edit pages, and some further model and spec updates
ExamPapers: Further work on edit forms and added controller test