Adding OpenDyslexic

A random collection of font mods is nice, but why not add something that could be helpful to some people? I've added the font OpenDyslexic, which is an accessiblity feature! 

I'm not personally dyslexic, but it can't hurt to add it, so here it is. I'm not sure how well it helps, though.

https://opendyslexic.org/