NO-JIRA: add some info to readme

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1571458 13f79535-47bb-0310-9956-ffa450edef68
QPID-5557: allow disambiguation of node type

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1571459 13f79535-47bb-0310-9956-ffa450edef68
NO-JIRA: fix malformed install directory

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1571470 13f79535-47bb-0310-9956-ffa450edef68