Added prompt model and controller
new, create and show actions for prompts
DRYd up form and added edit action
Added edit link
Added submission as a nested resource under submission
Added model for peer evaluations
Added peer reviews
Added dependent destroy association
Added fake upvote buttons
Moved back button
Moved grade demo to a partial
Added my groups to home page for logged in users
Hiding activities div if there is none
Added method to see if reviewer has reviewed a submission
Added method to check if user has submission, hiding button if true
Added button to add new activity
Added helper method for active context
Resetting session before LTI launch
Minor layout changes
Changed active course identifyer