定时更新显示的私信(500毫秒)

Signed-off-by: ZhongLing <kevin6132919@163.com>
即时站内信
Merge branch 'master' of git@github.com:zhengjiabin/ISharing.git

Conflicts:
	WebRoot/WEB-INF/classes/com/ISharing/Action/MessagerAction.class
	WebRoot/js/messager.js