RestaurantBasicData & RestaurantModel:
   add CreatedAt and UpdatedAt property
   Function UpdateDatesOfRestaurants (in WebApp RestaurantController)
   (updates CreatedAt value from RestId, updates UpdatedAt value from latest updated dish in rest)
   Add Sort functionality by adding jquery.tablesorter.js in main list of restaurants.
ServiceLayerImpl:
   Add functionality of update UpdateAt value when restaurant updated,
   and CreatedAt value when add new restaurant.
Plateful:
   Redirection to wrong page bug when editing restaurant info
   Disable null description show on first page (list of restaurants)