For many travelers, airports are places to pass through as swiftly as possible, not places to savor. The incessant drone of announcements, the frustration of being shut out of increasingly exclusive lounges, the overpriced food, the serpentine lines and the fruitless search for an electrical outlet all can make for a hellish experience. But every now and then an airport can offer unexpected and delightful amenities that ease travel’s pain points. For Bill Tsutsui, 60, it was the vending machine