WebTest documentation bugs

[sluggo]

In  http://pythonpaste.org/webtest/, the link under response.click() is dead. (It points to  http://pythonpaste.org/webtest/class-webtest.TestResponse.html#click).

The docstrings of several TestApp methods say they return webob.Response but they actually return TestResponse. This makes it harder to find documentation for all the response methods.

The no argument to TestResponse.mustcontain() is undocumented in the docstring and on the website.