CAS Server 3.4.7 Release

1. Cas Login Tokens (LT) now conform to the protocol specification, making them harder to guess

2. assembly.xml now includes .crt and .crl files so releases build correctly locally.

3. Principal attributes are logged

4. Fixed NullPointerException in Service Theme Resolver

5. Username is persisted across login pages during failed authentication

6. cas-servlet.xml now uses same property configuration as rest of application.