also removed one passible cause for memory leak. Feedback was unnecesarily stored in the store under state.feedback

Solution is no longer displayed on student page because it may contain grading information which has been changed during the grading process and would thus confuse the student

Use postgres:9.6 is ci

The student page will no longer crash should there be no feedback objects for submissions and display a message to the user explaining that the submission hasn't been corrected due to the exam beeing pass only.

Closes #101

Added HIDE/SHOW FEEDBACK Button in submission Correction top toolbar to toggle the visibilty of all comments (own as well as others). Open editors are not closed.

closes #91

Forgot one slash...

Fixed subscription deletion

Added welcome Jumbotron with some nice info/links

Some work on start page

Added feedback_stage_for_user to feedback serializer

This field will contain the feedback stage of the subscription for which the requesting user has created this feedback. This is needed to correctly give the choice to set the final attribute in the frontend.

Fix final checkbox frontend

Fix disappearing names in feedback list

Solution Syntax highlighting

Student names in Subscription list for reviewer

Short polling on orig Feedback

Refresh button student list

FeedbackComment visiblity indication

SubscriptionEnded page

Right side of student overview is sticky

Statistics overview