Description:
    Creates new Delivery type

Example:
    rails g shopping_cart:add_delivery 'Nova Poshta' 5

    This will create:
        SQL (1.2ms)  INSERT INTO "shopping_cart_deliveries" ("title", "price", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["title", "Nova Poshta"], ["price", 5.0], ["created_at", 2016-09-17 11:07:32 UTC], ["updated_at", 2016-09-17 11:07:32 UTC]]