Fix #476 Auto language changing function finished.

Fixes issue#476.
If the user does not have the freeseer.conf file, the function will detect the system location for default language.
If there is a config file, the language setting in that file will have higher priority.
For Chinese, If the location is not zh_CN, Traditional Chinese will be used.
If there is no translation for the system location, English will be used.
I don't understand why we need a special case for Simplified and Traditional. In addition I also don't understand why Traditional has higher priority? can you explain this?

Also when doing comments it's good practice to leave a space between the pound (#) and your text.