修改
Merge remote-tracking branch 'origin/dev' into dev
1、添加tadayMessage  获取当天聊天消息的历史记录
2、添加offtadayMessage 获取当天官方直播员聊天消息的历史记录
Merge remote-tracking branch 'origin/dev' into dev

Conflicts:
	src/main/webapp/static/chat/js/client.js