How a 17-year-old built a media empire
                                
                                
                                    (Newser) -
                                    Tavi Gevinson became a fixture in the fashion world at age 11, thanks to her blog  Style Rookie . Today, she's 17 and running  Rookie , an online magazine delving into everything from  pop culture  to  feminist issues  to  love  to  body image  to  celebrity interviews . Tavi and Rookie have come...