Roger,
In this folder are the updated versions of the materials that I presented in your class. 
I have fixed some minor glitches and re-organized the content into smaller pieces so that 
the in-class exercise is started earlier. I think this will help students with practicing 
and understanding reasonable chunks of git, one part of the in-class-exercise at a time. 

Please make all of these files available to the students, hopefully an eager few will try 
it out over the break. I would even give them the teacher version of the in-class-exercise 
so that they can make sure they are doing it right.