It was badly broken after refactoring into EventObserver.
Fitst, deinit() method was never called which lead to bad record
files. Then, the concept of counting pollEvent() calls was ignored.
Introduced dispatchPoll() method of EventObserver which is implemented
in EventRecorder. It counts calls so is able to inject events at
more proper time.
Additionally now event times are recorded.
This also removes the dependency of engines on the event recorder header
and API, and will make it easier to RandomSources that are not properly
registered.
