Display totalDue for each registration
Pass into AdminDataCtrl & AdminDetailsCtrl the current permission for the logged in user on this conference.
Display and conditionally allow for update to total due on admin screen
 - Add a directive <total-due>
 - In RegistrationCache add a method to update a Registration and make sure to copy objects when putting them into the cache
 - Add a modal window view and controller for actually updating the total due
ConferenceCache will include initial page and blocks that are required on all conferences
Correct api url
jshint fixe
jshint fixes, fix api url