CAS server (SSO) with user-attribute release

A CAS (SSO) authentication module for Moodle that uses released attributes rather than LDAP for user information.
This is an authentication plugin for Moodle that authenticates users via a Central Authentication Service (CAS) server and
populates the Moodle user account’s attributes from user-attributes included in the CAS response.
This method does not make use of LDAP for user-attribute lookup, allowing its use in situations where there is no LDAP server
that includes user information, or there are multiple LDAP servers that include user information.
This authentication method makes use of the attributes returned by the phpCAS library’s phpCAS::getAttributes() function and which
are often returned from modern CAS servers.