A weird coincidence treated Docs Ireland attendees to a pair of documentaries set in and around Gort, a small Galway town near the Clare border. Treasa O’Brien’s Town of Strangers is the more immediately charming of the two, an assemblage of residents who find themselves, through birth, accident or chance, sharing the town. O’Brien herself is a casual presence in the film: she was in the town trying to cast non-actors for a scripted feature, but found herself drawn towards the energy and personality of the people who showed up at auditions, and decided to stick around, living out of her van.…