Add verb field to OAuth1TestCase
Set request.method based on verb specified for test case
Add test case for unpacking HTTP PUT requests
Unpack params in form-urlencoded request body regardless of HTTP method
Rename paramsInPost to paramsInRequestBody

paramsInPost suggests that the HTTP method is POST, but the params could
be in the request body of any request with the appropriate Content-Type.
Explicitly add params to request body based on paramsInRequestBody
Add test case for rare bird: HTTP GET with a request body
Merge pull request #11 from twitter/remove_post_body_restriction

Unpack params in request body from non-POST HTTP requests