Request: Add support for reading utf16 files in jc lua.

[Osmosis-Wrench]

It's not really a major issue, but occasionally I'll try to load files from users from non-english speaking countries (especially Japan it seems) and they'll be using a format other than UTF8.

I know this is a Lua limitation as well, but looking around there seems to be some people who've created libraries that allow for it. I tried doing it myself, but I just can't work it out unfortunately.