If you stop in to When Pigs Fly Sourdough Bakery’s new shop outside of Davis Square, be sure your stomach is empty—the friendly loaf slingers behind the counter have samples of every bread right out on the counter, and it’s hard to say no. Bostonist enjoyed all of the bread we sampled, but we really loved the banana pecan, maple, and brown sugar bread, especially smeared with a little bit of their own pumpkin......