staff cannot add students or remove them from the sg
staff cannot add students or remove them from the sg2
fixed some bugs on staff view of sg show. Made it so staff cannot delete a sg
ability.rb to take away sg removing power of staff
staff cannot see buttons of edit/destroy for other staff but himself and admin
paginated notes and ordered notes on staff show
ajax for staff show page on adding/removing sg done
did admin/staff separation and clean up of student show page