SLING-3223 - new replication module, contributed by Tommaso Teofili, thanks!

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1547378 13f79535-47bb-0310-9956-ffa450edef68
SLING-3223 - new replication module

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1547380 13f79535-47bb-0310-9956-ffa450edef68