Merge pull request #42 from songjiayang/master

基本完成社区功能
remove file not used
update database.example
Merge pull request #43 from hlee/master

subtle change
added return path
added filter and only allowd edit user self
Merge pull request #44 from hlee/master

only allowed to edit and destroy self user
完成论坛功能
Merge remote-tracking branch 'cms_6bey/master'