authenticator impl allows cert-only subjects

added getPoolStatistics so test code can access stat summary

Fixed gathering of operator credentials

fix GroupURI to check that scheme is ivo

issue-19 - WhoAmIServlet supports different AuthMethods

Fix to support TERENA certificates

issue-10 - fix to GroupURI equals()

cadc-access-control-1.1.2: added simple GroupAuthorizer that can be p…

cadc-access-control-1.1.2: added simple GroupAuthorizer that can be plugged into cadc-log; fixed main class name in build

issue-10 - reverted API changes in GMSClient

Issue 10 - Full URI with authority in Group Model

issue-11 - allow users with only one type of identity