OAK-710 : PermissionValidator: Proper permission evaluation for moving/renaming nodes (WIP)
Remove method unwrap from ImmutableTree, which duplicates method getNodeState on AbstractTree and replace callers of the former with the latter

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1545674 13f79535-47bb-0310-9956-ffa450edef68
OAK-1133: Observation listener PLUS
Javadoc

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1545675 13f79535-47bb-0310-9956-ffa450edef68