Coursys vs. Courses
CourSys (the system) is located at courses.cs.sfu.ca
The codebase is located in a folder called 'courses'. Moving it will cause things to break.
It's confusing, I know.
As an attempt to clarify the nomenclature:
"Coursys" is the Brand Name of the system. Use it when describing the system. This is the displayed name of the system.
"courses" is the name of the codebase and core libraries.
So, you check out and build courses, which gives you a running instance of CourSys.