Grade levels
reapair functionality to Add A Level button
Merge pull request #832 from UM-USElab/grade-levels

Grade levels
Temporarily removed notifications
Merge pull request #833 from UM-USElab/gradebook

Gradebook
Removed sendgrid and minitest
Merge pull request #834 from UM-USElab/removing-extra-gems

Removed sendgrid and minitest