verbose event function name in call stack (was anonymous function before)
reset value/state changed flags before set new value/state for DataObjectSet (it may cause new changes require to be processed)
small changes for DataObjectSet#timer_
handle transport abort event and turn origin into undefined state
drop callback definition and export

patch https://gist.github.com/lahmatiy/5891561
don't emit failure event on abort, set undefined state for request on abort (it's settable via AbstractRequest#stateOnAbort)

patch https://gist.github.com/lahmatiy/5891591