Fixed CAS attributes for jasig compatibility

Boxed the attributes into <cas:attributes> element and
made attribute keys namespace aware. This is tested
with jasig java client 3.3-SNAPSHOT and rails
devise_cas_authenticatable version 1.1.4.
Added italian traslation
Merge pull request #167 from MdreW/master

added italian translation
Merge pull request #165 from inka/fix_attributes_for_jasig_compatibility

Fixed CAS attributes for jasig compatibility
Merge pull request #166 from swobspace/ldap_username_postfix

Username postfix for ldap_authenticators
Merge remote-tracking branch 'upstream/master'
removing extra_attributes entry groups

  resolving groups may give too much entries for mod_auth_cas (-> http error 500)