Feature request: query string parameters

[chase-seibert]

It would be a nice feature to be able to specify query string arguments that a mocked request should expect. Further, it would be even nicer if you could specify just a subset of the parameters you expect to be passed.

Use case: I'm testing an OAuth implementation. I want to validate that the library is calling various REST endpoints, and I want to validate that it's passing some static query parameters like oauth_token and oauth_consumer_key. But I don't want to validate values for non-static fields like oauth_timestamp.