Another usage example

[Golan Derazon]

Hi,
Thank you for the useful oauth2.0 implementation.
I found another example usage of this project:
https://github.com/tuxdna/play-oauth2-server
This example is more comprehensive, it will help other users.
Can I add it to the readme-->examples section?

Thanks,
Golan

[Tsuyoshi Yoshizawa]

Sure. Please give us your PR.