LONDON (Reuters) - Singer Louis Tomlinson of boy band One Direction has signed for English Championship side Doncaster Rovers on a non-contract basis and could play for their development squad this season, the club has announced. Tomlinson 21, heartthrob to millions of teenaged girls around the world, has also been given squad number 28 which qualifies him to play for the club's first team in the second tier of English soccer, although that is unlikely to happen. ...