added EventImpl.toString from Clebert

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1594941 13f79535-47bb-0310-9956-ffa450edef68
PROTON-549: removed redundant typedefs from perl.i

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1595016 13f79535-47bb-0310-9956-ffa450edef68