At 7:30 on a June evening, Ashley Nadeau and Tina Gosselin were already joking that they were up past their bedtime. A cool breeze drifted across the rooftop of their downtown Biddeford apartment building. At 63 degrees, the air felt a little chilly for June, but neither woman seemed eager to leave. The view helped. Below them, downtown Biddeford settled into the evening. The Saco River reflected the last light of the day while streaks of orange, pink, and purple stretched ac