added redis config for appfog
Merge pull request #5 from JamesS237/master

merge subject_average division by nil error fix
changed gemfile back to what it should be
removed precompiled assets
merged James's average fix changes
fixed add result
Added rank to student index page
Merge pull request #10 from JamesS237/rank_students

Added rank to student index page
Add delete button in results if you are owener or an admin, fix enter bug on results page, refresh on save/delete