http://blog.csdn.net/hereweare2009/article/details/3968582
http://blog.csdn.net/hereweare2009/article/details/4018274
http://kejibo.com/oauth/
http://kejibo.com/oauth2/
WIKI:http://zh.wikipedia.org/wiki/OAuth
http://wiki.dev.renren.com/wiki/WEB%E7%BD%91%E7%AB%99%E5%B8%90%E5%8F%B7%E7%99%BB%E5%BD%95%E5%85%A5%E9%97%A8%E6%95%99%E7%A8%8B