Remove type=web_server from redirect URLs

As of version 0.9.11 the oauth npm no longer adds the type parameter
so we need to stop expecting to see it. Explanation at:

https://github.com/ciaranj/node-oauth/commit/8658d7d55be25528a091415ca01671e6ef2a9882
Merge pull request #11 from tomhughes/oauth

Remove type=web_server from redirect URLs