VEVEY, Switzerland (Reuters) - Food giant Nestle will hit its 2020 organic growth target later than envisaged, it said on Thursday after posting its highest annual growth in four years and improved profitability.Like other large food companies, such as Unilever , KitKat and Nescafe maker Nestle has been working hard to streamline its diverse portfolio in keeping with changing consumer tastes and growing demand for healthier and more environmentally friendly produce."We are convinced we'll get..