Shared/DataBase

Use different lock.

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

Generate object guid.

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

Item can save and load from db
Object/Player

Send inventory list when player login.

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