http://mikanmarusan.hatenablog.com/entry/20130305/1362439681 https://github.com/intridea/omniauth-oauth2 https://github.com/yamitake/omniauth-yconnect http://oauth.jp/blog/2013/01/23/oauth-20-core-bearer-spec-rfc-rfc-6749-rfc-67/ https://r…

http://bugsrock.com/blog/2013/02/27/heroku-%E7%94%A8%E3%81%AE-facebook-template-%E3%82%92-Sqale-%E3%81%A6%E3%82%99%E5%8B%95%E3%81%8B%E3%81%99/