Learn c and c++ tutorial link broken

At the bottom of the about page
The learn c and c++ tutorial by Philip Machanick link takes you to a login page for the university of queens - is this tutorial not accessible to the public?

the tutorial can be found here: http://mondrian.die.udec.cl/~mmedina/Clases/POO/Materiales/Machanick%20-%20C%20and%20C++%20in%205%20days.pdf


This would make a good GitHub Issue on the openframeworks/ofSite repo, the file appears to be about/index.html.mako.