PROTON-491: applied patch from Dominic for receiver name

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1592009 13f79535-47bb-0310-9956-ffa450edef68
PROTON-577: modified EventImpl and CollectorImpl to avoid using LinkedList and to pool events

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1592601 13f79535-47bb-0310-9956-ffa450edef68