Updated assembly version and fixed bug where use wasn't set unless tile was true. Now, use is set all the time, whether true or false. Twitter API has a bug where omitting use is interpreting use as false. By setting it explicitly, we have a work-around for the problem.
Modified CloseStream logic to stop processing messages sooner. Added .NET Cancellation Framework support. This includes a new Extension method, WithCancellation(CancellationToken) to support query cancellation. See StreamingDemos sample on proper usage.
Added Media class which should have been added via earlier commit.