First pass at instructor groups
Test the courses property on the instructor-group model
Fix the buffered title on instructorgroup/group controller
Fix new instructor group display
When a new group is added use an alias property so the title doesn't sort until it is saved.
Also added a flat remove button because there is no loss if a new group is removed since it contains no data.
Add missing test for new instructor group sorting
Merge pull request #4 from jrjohnson/instructorgroups

Basic Instructor Groups