[keycloak-dev] persistence apis refactored

I refactored the persistence apis into different maven modules. Everything in services and in package org.keycloak.services.models has been broken up as follows model/ api/ jpa/ picketlink/ All top level interfaces are in api/. Picketlink in picketlink. Package name has been switched to org.keycloak.models This screwed up Viliam's pull request. -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com