* Fix the following issues:
1. HashMap non-thread-safe issus
2. Fix the same problem in pr621, but use a better implementation
Add the following functions:
1. There is now a language cache inside getLanguage to prepare for different languages corresponding to different time zones where the accounts in the server are located
* add /language command,each account has their own Locate
Set current character talent level by using /talent command.
> /talent getid - Gets current character talent ID
> /talent set <talent ID> <level> - Sets current character's talent level
