Idea for accepting token in queryString for get requests.

We had to implement a custom TokenReader that was something like this as we had some images that were secured but needed to be fetched from img tag in a browser. This illustrates the concept but is more for discussing the feature than a finished and ready to merge code. 

Looks like was discussed some here #100 but I went a slightly different way about it. 

I can tweak and work on it more if interested.