Update Twitterizer2.Streaming/TwitterStream.cs
Update Twitterizer2.Streaming/TwitterStream.cs

Add proxy to StreamOptions so Streaming API works through a proxy in a similar manner to the standard API
SwatantraYadav/Twitterizer,GProulx/Twitterizer,yonglehou/Twitterizer,CruelCow/Twitterizer,yonglehou/Twitterizer,CruelCow/Twitterizer,SwatantraYadav/Twitterizer,GProulx/Twitterizer