Make documentation of class User and added some function for support.
Make documentation of all models and add a new model (Attachment) and add some support method
Fix some things.

Modify Rest APi for register.
Make register page (still don't know whether show message or redirect after success or errors).
Implement login using database.
Merge branch 'master' of https://github.com/dragoon20/IF3038-2013
Fix Profile