Merge pull request #3 from amulius/josh

Teacher vs. student paths
Merge pull request #4 from amulius/josh

changing models and getting active course
Merge branch 'master' of github.com:amulius/classtracker into josh
Merge pull request #6 from amulius/josh

did the logic in the view to see if a student has checked in for a class
working on the check in
Merge branch 'master' of github.com:amulius/classtracker into josh
here is my version of the check in that removes the button after checking in