The signature is incorrectly calculated for Curb Requests

[libc]

https://github.com/pelle/oauth/blob/master/lib/oauth/request_proxy/curb_request.rb#L18 contains

    def method
      nil
    end

And the method method (:)) is used in the signature calculating method. I monkey patched it to

OAuth::RequestProxy::Curl::Easy.class_eval do
  def method
    options[:method].to_s.upcase
  end
end

I'm not sure what's the proper solution is, but right now without the monkey patch the remote server throws the signature invalid error. I can provide the patch, but it's kinda trivial to make anyway.

Cheers.