Support non Rack-Test calls

[cowboygneox]

This library is exactly what we want to use to externally test our API's, but we can't use Rack-Test. Is there any interest in me creating a pull-request that would offer a remote implementation? I guess I would lean towards using rest-client, but if you guys want something else that's fine too.

Let me know if you'd like to open a dialog on this.

[jayzes]

Hey @cowboygneox - sure thing! It's not a need I've personally had but I'd happily look at a PR for it. Something like this might do the trick as well: https://github.com/ooyala/remote_http_testing

[cowboygneox]

@jayzes I like yours better. Let me see if I can throw something together.