RICHARD LOUGH  FOR Paris photographer Olivier Sanchez, there is only one story in town: the new life of Lionel Messi. Newspapers and magazines around the world harangue his Crystal Pictures agency for images of the Argentine footballer, his wife and children settling into the French capital a month after arriving. "Today, for me, it is Messi and no one else," he said. "Everybody wants a piece of him. He is king. Simple." When Messi's childhood club FC Barcelona announced they could not afford to keep the six-times Ballon d'Or winner, French club Paris St Germain (PSG) swooped. PSG agreed a…