Code cleaning up
Doc update
Updated doc
Update locale for article
Update local for comment
Update locale for demo
Update locale for message
Update locale for page
Update locale for system
Update locale for tag
Update locale for user
Update locale for widget
Updated doc
Updated module i18n files
Add check exist for ajax
Merge pull request #554 from liuchuangww/user

Add check exist for ajax
Code cleaning up
Code cleaning up
Code cleaning up
CS fixes