Add mref from entities to tags.
Parse the tags while parsing the EntityMetaData.
Create a bean to store all the intermediate results.
add parsed tags to ParsedMetaData value object
Allow objectIRI and codeSystem to be null.
Make CodeSystem nillable
Allow tags column on entities sheet.
Must remember entity that tag belongs to, so store IntermediateParseResults in a multimap mapping simple entity name to tags.
Lookup the appropriate EntityMetaData object once you're done parsing and sending the ParsedMetaData to the importwriter.
Let the ImportWriter write tags to tags table using the tagRepository and UntypedTagService.
entity tags should be MREF, not XREF
Add couple more Relation options.
Add entity tag, update package tags to use new Relation options.
Show entity tags in model registry.
Document the difference between IntermediateParseResults and MetaDataChanges.
parsedMetaData -> intermediateResults
show tags with iri as link, otherwise as label
Merge pull request #2174 from fdlk/feature/tagEntities

Feature/tag entities