Revert "Merge pull request #34 from rlobo3/master"

This reverts commit f912223238a937625b20cde70cfedccc60b89266, reversing
changes made to ad2e48cb035ffbef04942cc23bee1681984adfbb.
Merge pull request #36 from TeamRedInc/revert_pull_request

Revert "Merge pull request #34 from rlobo3/master"
Added SolutionCode column to Problem data file
Merge pull request #38 from jwien001/master

Quick fix to test database data file
Modified Class pages

HomeClassListModel = now contains 3 lists: those that the user is an
instructor of, those that the user is a student of, and the rest of the
class
ClassHome = now has 3 sections: one, if the user is an instructor can
edit, get details, and delete the class, two, if the user is a student
can get details and problems sets, and three, the remaining classes
where the user can get details and can join the class
Core = has two additional methods so that I can call getStudentClasses
and getInstructorClasses
Changes to project file to include new