* The new version 2.2.0 of couchbase server permmits the deletion of a locked object. So now the unlock/delete is replaced by a unique delete method (with cas in non-sticky and without it if sticky).
 * Upgraded libraries for couchbase-client-1.2.1 and spymemcached-1.10.1, now they are in maven central repository. The pom is modified.
 * The EclipseLink repository (required by glassfish) has been changed cos the previous one was really slow.
 * Added the PNG icon.