Authlogic --- RoR下authentication solution

http://www.dixis.com/?p=352

http://rdoc.info/github/binarylogic/authlogic/master/file/README.rdoc

http://techoctave.com/c7/posts/37-authlogic-and-rails-3-0-solution

http://www.allerin.com/blog/authlogic-gemplugin-with-ruby-on-rails-3/

http://iterat.ive.ly/index.php/2010/09/03/upgrading-your-authlogic-gem-for-rails3/

http://wuhuizhong.iteye.com/blog/876101

https://github.com/binarylogic/authlogic