NO-JIRA: create branch for qpid-cpp 0.34 RC process

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/qpid-cpp-0.34-rc@1687469 13f79535-47bb-0310-9956-ffa450edef68
tree: 2f4d8174813284a6ea58bb6b7f6520aa92287476
  1. qpid/
  2. .gitignore
  3. .mailmap