Add dependency for Cru's custom cas client library
Adding configuration to begin integrating CAS filter.  Though something is not working b/c the CAS server is not recognizing the ticket it gave out.
Adding servlet to handle populating the user session with Relay SSO GUID
Adding lookup service to find a user stored in the database
Storing and retriving identity records, both internal to CRS and and external (relay, fb, email)
-Also updated database config for tables to store this info
Adding JPA annotations to these classes
Adding some documentation
Updating database creation scripts to include some basic identity information
Adding the filtering of conferences returned in the get all conferences endpoint to only those the session user has access to
First conference endpoints are secured based on the session user
Further securing endpoints on the conference endpoint.
Fixing an issue in registration service that throws an exception when no registration is found for the current user
More documentation
Merge branch 'facebook-auth' of http://github.com/CruGlobal/conf-registration-api into facebook-auth