SOUPER: Sept. 3 opens the month of tasting at restaurants, topped by the fest on Oct. 1. (Photo by Ryan Morrill) “Traveling tasters,” it’s time. The Chowder Trail, that chain of destinations where this year’s competing soups will await showing off, will be open for nearly a month, Sept. 3 through Sept. 30. Tasters can check in, buy chowder either to go or with their dining experience, and vote onl