HI,all

Days ago, I found this project babel, and tried to use it in my project, as I'm Chinese, I found it doesn't support GBK encoding in babel, so I wrote a patch for babel to make it support GBK.

I just used common lisp for not a long time, so if there was something not good enough, please let me know, I also hope you can accept this patch or help me modify it to make babel support GBK, so we can use it freely to process Chinese text.

Thanks.