“Charlie” For nearly two decades, Scott Schuman has been photographing ordinary people on the street, from New York to London, to Moscow and beyond. People whose clothes and style he finds interesting and attractive. People who have “that certain something.” The “Street-Style Photographer,” or the “Street Photographer” posts the photos on his now-famous blog, The Sartorialist. His photos have become so popular and coveted that articles, “step-by-step guides” — even “flowcharts” — have been published with advice on how to be at the right place, at the right time, wearing the right clothes to in…