Initial implementation of timer events and reconnecting example

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/branches/examples@1617751 13f79535-47bb-0310-9956-ffa450edef68
Updated docs

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/branches/examples@1617752 13f79535-47bb-0310-9956-ffa450edef68