Update the Description for locale zh-CN

I fell so happy and lucky that you merged my codes. Right now i modified the localized extension description for zh-CN , please merge it . And now , i really can't wait to see the new release of this powerful tool , hope this will be soon.

About BabelZilla , i logined it and note that the version of web-develpoer on BabelZilla was still 1.2.2 , i have no idea how to update the translations of zh-CN . Is there some mistakes i've made ? was my method wrong ? Now, I'm studying hard to find the right way to update the translations of zh-CN on BabelZilla , if you can give me some advise , that must be very find of you :P.