Hi! There's no explicit licence but you can essentially consider it CC-BY. I'm ok with people hacking it, remixing it, writing materials for it as long as some credit/attribution is given to the previous work.
Wonderful. ^^
Hey, any chance you would be willing to add that text to the PDF? Just to make it official
I'd love to update the pdf, but I've just been really strapped for time recently. I'll get to it when I can.
No problem, thanks!
