Added endpoint to set tag occurence to finalized
Added final annotation endpoints
Tag merging for final annotation beta
Added endpoint for marking annotations as done
Added sentiment to Tags and SubTags, modified create/update tag/subtag endpoints, added set instance sentiment endpoint
Endpoint for adding Notes to annotations in AnnotationController
Endpoint for annotation instance deletion - untested
Minor fixes, added annotation instance endpoint - untested
Added GET /annotation for retrieving annotation state
Endpoint /user/annotations for user's annotations
Added endpoint to UserController
Added AnnotationController and Service
Documents can now be assigned to Users