Add validators and incorporate into User model
Use accessible_by method on index methods to ensure that cancan does filter records correctly.  Issue submitted to cancan
Create methods to return institution and institution_id for all classes not related to Institution so Cancan can filter access based on institutional affiliation
Cancan mongoid initializer to do requires that should be part of Cancan but are not working
Create four link helpers (CRUD) that check ability before presenting link.  Incorporate some default bootstrap behavior so as to keep method invocation DRYer
Clarify roles more clearly.  Have tested them through browser, not Rspec
Fix potentially broken redirect
Add accessible_by to index action on DescriptionObject
Fix typo and create custom notice for User#destroy
Add phone_number to permitted attributes on UsersController
Create user validation for role value
Add include Mongoid::Timestamps to all models
Update views to include link helper methods and enforce abilities