Refactored util into more sane namespaces

Created annotations, dao name spaces
Refactored tests passing
Add api-key arg to dao/into-seq

We need the api-key to process annotation user names, etc.
Fixed test from api-key arg to dao/into-seq
Test dao/convert-entity-to-map pipeline
Shape of union-annotations
Shape of union-annotations
Unionize annotation documents in /annotations endpoint

Also removes :annotations from the dto... it's not clear how it's useful
Adds links to annotation documents
Removes cleaned links
Adds annotation document self link
Merge pull request #14 from physion/annotations-api

Annotations api