Pixelly font library for OpenSCAD

This is an OpenSCAD library to generate pixelly fonts, mostly based on some PalmOS bitmap fonts from Ron Buelow. There are 29 fonts included.

I used it to make a Minecraft-themed text topper for a birthday cake.

To use, start with:
`include `
The syntax for the main library call, with defaults indicated, is:
`renderString(string,font=font_8x8,halign="left",valign="bottom",invert=false,spacing=1,size=10,pixelScale=1.01,height=0)`

`string`: text to render; only characters included in