Pixel fonts could be sharper

When you put a pixel font rendered by Caxton and the default bitmap font up next to each other, the bitmap is quite a bit more crisp than the Caxton font, as you can see in this screenshot:

I understand that this is because Caxton tries to do antialiasing, and also doesn't support hints. But outside of things like signs, there's really no need to antialias a pixel font, so it would be nice if Caxton font definitions had a way to disable antialiasing, at least in the GUI.

(Thanks for this mod by the way, it's made a really fun project possible!)