Add ability to create answer on PUT, when answer for provided id does not exist.
Add registration id to answer entity.
Producing Registration on PUT to registration resource
when provided registration to update does not yet exist.
Do not consume registration or answer entity object on resource delete
Return no content status code on resource delete
Fix minor bug in registration/answer functional tests.
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
Merge branch 'enable-relay-auth' of http://github.com/CruGlobal/conf-registration-api into enable-relay-auth