Remove statuses dependency

[jwerre]

Use http.STATUS_CODES instead.

[HappyZombies]

Hello, due to this project appearing to be dead and no maintainers responding, I went ahead and forked the project under a new organization, and will continue the work over there. https://github.com/node-oauth/node-oauth2-server

Feel free to move over there to further the discussion. This could definitely be something we do for the new minor version