As you might have seen, I've added type 4 function support. I've had that started about 10 months ago as a pet project but never finished it. Now I had to opportunity to do just that.
I don't have many PDF files to verify the behaviour but results look good so far. I think I've got a good test coverage but I'm not sure I made the right interpretations everywhere. I'm grateful for feedback. Thanks, Jeremias Maerki
