Merge pull request #9 from AngryPowman/able

修改部分房间模块协议，修改RoomManager和Room类
增加心跳处理
Merge branch 'master' of https://github.com/AngryPowman/ZeusMud into AngryPowman

Conflicts:
	src/center_server/game_session.h
增加心跳机制
添加房间信息修改的处理和广播
Merge branch 'master' of https://github.com/AngryPowman/ZeusMud into able

Conflicts:
	src/center_server/game_session.h