Creates the models for the venue feedbacks and the ratings on venue feedbacks
Adds the ability to post comments on venues (need to specify the user)
Makes the current user as writer of the feedback
Adds the uniqueness of the feedback per user per venue (needs improving)
Makes a feedback deletable only by the feedback writer or an admin, improves the management of the uniqueness of a feedback per user per venue
Hides the feedback form when a feecback is submitted
Corrects and modifies the destroy function on feedbacks
Corrects an anomaly when creating a feedback
PR comments - JS error validation displayed

[#39946735]
Treats the case when a feedback does not exists, adds alerts, notices and locales
PR comment

[#39946735]
PR comment - seed

[#39946735]
Fix request

[#39946735]
Merge pull request #14 from WilfriedDeluche/feedback-model-39946735

Feedback model 39946735
Solves conflicts

[#48647481]