HBASE-8796 Add mention of new builds mailing list to site

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1496136 13f79535-47bb-0310-9956-ffa450edef68
HBASE-6295  Possible performance improvement in client batch operations: presplit and send in background

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1496156 13f79535-47bb-0310-9956-ffa450edef68
HBASE-6295  Possible performance improvement in client batch operations: presplit and send in background - round 2

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1496157 13f79535-47bb-0310-9956-ffa450edef68