* New HTTPHandling Methods
  - Reponse.__nonzero__ (false if bad HTTP Status)
  - Response.ok (True if expected HTTP Status)
  - Response.error (Logged HTTPError if bad HTTP Status)
  - Reponse.raise_for_status() (Raises stored HTTPError)

Still handles request in the event of an HTTPError. (Issue #2)
Eventlet and Gevent Monkeypatch support.
Cookie Support (Issue #1)

* Added file attribute to POST and PUT requests for multipart-encode file uploads.
* Added Request.url attribute for context and redirects