Add API calls for iterating through an event. This should allow events to have...

Add API calls for iterating through an event. This should allow events to have multiple information elements (while there was nothing preventing it before you could not actually access any except the first one).


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81334 65c4cc65-6c06-0410-ace0-fbb531ad65f3