ACCUMULO-1187 small updates to the user manual

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1458335 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1187 small updates to the user manual

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1458337 13f79535-47bb-0310-9956-ffa450edef68