Continue the process of encapsulating constants and functions relating to course type.
For example, app/assets/javascripts/components/course.cjsx compares a course.type against
'ClassroomProgramCourse', and references l10n strings courses.students_short and courses.editors, depending on course type.
We also might want to build a real feature on top of "course type", for example a library of templates for common types of course, available for cloning.