Implemented peer_review scoring
Some missing directives
Show a modal window with the details of the peer review
Add 'unit' filter to the EvaluationCriterionResource
Show the name of the evaluation criteria in the review detail modal
Function to save reviews in mongo
Unify in integer all ids (raise a BadRequest), revise Integrity in save_review (avoid duplicated reviews)
Messages to show to the user after submiting peer review assignments
Fetch pr criteria properly using BB sync
Review submissions of peerreview works
Revert id initialization. PUTs used as POST fails when id=-1
Reimplement the calculation of qualifications
Review submission interface improvement
Adding reviewers list to every submission to easy filter already reviewed submissions
Created PrivatePeerReviewAssignmentResource
Implemented modifying peer asignment data in course administration interface

Description and minimun review number can now be modified.

New peer asignments cannot yes be created and EvaluationCriterion are not
yet handled.
Implemented peer review assignments deletion
Change id handling before creation in PeerReviewAssignment
Implemented creating peer review assignments
Fetching peer review evaluation criterions