Visibility concern default visibility and query scopes
Collection Controller
Install cellect add Zookeeper to Vagrantfile
Add note about running a local Zookeeper
Add compound index on user_seen_subjects #80
Update Dockerfile and Vagrantfile to add Cellect
Have cellect load a user when the fetch a specific workflow
Add cellect support to classifications controller
Add subject controller random sort and specs
Add sample cellect config
Clean up debugging
OwnedVisibilityPolicy with scoped visibility
Update cellect version and use testing helper
Use session to store cellect hosts
Improve specs with cellect cookies
Update db schema
Merge branch 'collections_with_visibility'

Conflicts:
	db/schema.rb
api response content_type should be application/json

Our server requires the http_accept header with our custom api mime type but the response content_type header should be application/json and understandable to any client.
return json response for missing routes