OAK-301 : oak docu

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1595139 13f79535-47bb-0310-9956-ffa450edef68
OAK-301 : oak docu

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1595143 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'upstream-trunk' into OAK-1570