Make it work for browsers

[vbakke]

I have not yet tried including this in a browser.

Buffer.from(...) must be replaced by TextDecoder().
Feel free to add other browser issues if you try that road.

Aim is that this must work in both NodeJS and browsers.

[vbakke]

I'll use browserify to bridge the gap to browsers.

Also, the browser TextEncoder() has deprecated support for encopdeing text as UTF-16 (or actually, anything but UTF-8).