Create Persistance for plats table

Persistance class for the table plats in database was créated
Update restaurant_gui

Création du tableau des plats, du tables model, de la classe
MyConnection dans le package .util et la classe platsDAO dans le package
.dao. No issues.
update platsDAO

fixing list issue
Creating Background image for a Jpanel
Commit working directories for asma & imes

Fixing merging issue due to class conflicts.
Merge pull request #3 from CrazyCrewEsprit3a13/asma

Master