Hey there.

First of all, thanks for your continued work with this library.

I've been doing a bit of text rendering, and I've come across the classic "this font doesn't handle X glyph". Most systems handle this using a fallback font that have more codepoints mapped, but I didn't see an option to do it with this lib. Have I missed the option ? If it is not implemented I'm willing to do it if you give me some pointers to help get started.