Preferences are now groups
Groups can be either public or private (Private groups are not exposed as preferences)
machine names: app_group and private_group
the JSON for the preferences output is at http://app.group-comms.com/app-user-preferences/17
There is a new field called 'tag' which is used to group the preferences
https://stackoverflow.com/questions/14800862/how-can-i-group-data-with-a...