Reading the git log for the site with some of the book mixed in isn't the greatest way for a student to figure out what's changed...

Zed, I think many people would really appreciate a changelog of some sorts between the two versions.

edit: also see this comment by Zed which basically goes over what's changed: http://news.ycombinator.com/item?id=2700557

I agree but prior to your posting that link that was the only way I found and no not real fun wading through the change log like that.