---
* Keep URLs in-tact in cases such as
``app.get('http://www.python.org')`` (so HTTP_HOST=www.python.org,
etc).
* Fix ``lxml.html`` import, so lxml 2.0 users can get HTML lxml
objects from ``resp.lxml``
* Treat ``<input type="image">`` like a submit button.
* Use ``BaseCookie`` instead of ``SimpleCookie`` for storing cookies
(avoids quoting cookie values).
* Accept any ``params`` argument that has an ``items`` method (like
MultiDict)