Removing final modifier on class.  Useful for cases like http://shiro-user.582556.n2.nabble.com/shiro-guice-buji-td7578225.html
Merge pull request #2 from kushal256/master

Remove final modifier from class.  Useful for case as decribed in http://shiro-user.582556.n2.nabble.com/shiro-guice-buji-td7578225.html