Tests for implementations of IReactorWin32Events.
| Class | Listener | Listeneris an object that can be added to aIReactorWin32Eventsreactor to receive callback notification when a Windows event is set.  It 
records what thread its callback is invoked in and fires a Deferred. | 
| Class | Win32EventsTestsBuilder | Builder defining tests relating to IReactorWin32Events. |