Used the Grails Search tool to look for "//" to find commented out
blocks of code.  Removed 2-3 blocks of "dead code" that were commented
out and no longer used.
Renamed "addmany" in ProjectGroupController.groovy to "findFreeIndex"

You're welcome Andrew.
Extracted two methods from update in CourseController.groovy:
hasErrors() and hasBeenEdited()
Merge branch 'master' of https://github.com/Boidkan/SoftwareD_Refactoring_005.git