Set additionalProperties false on construct tags, refs #883.
Merge branch 'construct-tags-883'
reference -> items so that subschema is enforced, refs #884. Data QA required.
Merge branch 'reference-items-884'
Merge branch 'master' into es_rest_api
Be explicit about type for the benefit of the create_mapping script.
Simplify the elastic search update logic.
Improve create_mapping script.