Use OnDisconnect() handler when SHSocket::Disconnect called.

Signed-off-by: Y.Moon <chglove@live.cn>
Code style.

Signed-off-by: Y.Moon <chglove@live.cn>
Signed-off-by: Y.Moon <chglove@live.cn>
Start to build World/Map system.
* Add SHTimer class (in progress).

Signed-off-by: Y.Moon <chglove@live.cn>