Regarding support for Chinese text

[joanne-tseng]

Thanks for sharing such friendly tools for extracting PDF files.
It really has good effects.

Just want to ask whether you plan to support Chinese character extraction.
Recently, I plan to use this tool on extracting Chinese articles.
However, I find that all the Chinese words can't be recognized and come out as "?"s.

Or, if your group doesn't plan to expand this function into your library,
it is also appreciated if you can point out which parts of the source code is related to language support/character recognition so that I can do the required code modifications for Chinese recognition.

Thanks =)