QPID-4640: Fixed up some of the documentation from the autotools deprecation
- The new INSTALL-AUTOMAKE was incorrectly based on the new INSTALL not the old one
- The cmake build instructions didn't use a separate build directory which is the
  recommended configuration (both by cmake and qpid)

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1457373 13f79535-47bb-0310-9956-ffa450edef68