Stepper on OrderItem cell was replaced by 2 buttons
	added 2 methods in OrderItemCell (Plus and minus buttons)
		- (IBAction)removeOrderItemButton: (UIButton *)sender
		- (IBAction)addOrderItemButton: (UIButton *)sender
Handled situation whith possibility sending UPD order to server and changing quantity or OrderItem when status is “Served”
in OrderTotallCell
	changed method from
		- (void) drawCellWithModel: (OrderModel*)orderModel
		to
		- (void) drawCellWithModel: (OrderModel*)orderModel andChangedOrderStatus: (BOOL)isChanged
Added posibility make OrderItem “served” or Order “Closed” by using table editing function
Added images of buttons Plus, Minus and saving updated Order