Merge pull request #31 from chrisprom/master

cleanup collections json
Merge pull request #32 from chrisprom/master

cleanup creators json
Merge pull request #33 from chrisprom/master

restore nesting of parent subjects in JSON
Merge pull request #34 from mindking/master

Update JSON for Accession, CollectionContent ,Collections, DigitalContent
cleaup accessions, content, and digital content JSON
Accession ,Content, DigitalContent

accessions -> add primary creator like on collections
collection content -> pull in subject and creator ID
digital content -> add primary creator like on collections