Update example. Modified the origin example files.
Add models of Comments, Focus, User, Weibo. And add login and register controllers.
Modified the return information of login controller.
add a rbac module.
fixed a bug in example controller.
Merge with develop-example.
Fix the bug of rbac.
Fixed the bug of session and cookies.
Refactor juva.Controller, initialize permission autheniate when run the construtor.
Make a little change in juva codes.
Added controllers for example.
Handle static files.
update codes.
Modified the url pattern of captcha.
Fixed a authenticate bug.
A new parse type.
I'm so sorry to implement this ugly database module
Update example.
Remove a useless background pic.
Added a proxy of model.