several changes

a) tmp change the params config file on the url management to enable
gii module (remove the trailing '/*')
b) create facebook controller, add in php sdk
c) change database, add facebook table
d) modify the form to add in a js file
refine models using gii module + add facebook model to connect to db
finish facebook register and login
finish refining the models

a) move the load function to all controller and model
b) delete columncontainer model since columncontainer should not have
any data
c) modify the js script to make it more robust
fix the facebook like button bug
improve the social user identity model