Four Irishmen in a boat. It sounds like the start of a joke. The Camino Voyage, directed by Irish documentarian Donal O’Ceilleachair, chronicles the attempt of four Kerry men — and later, adding a dash of name-recognition, The Frames frontman Glen Hansard — to travel the traditional route of the Camino de Santiago, also known as the Way of Saint James, an ancient pilgrimage from Ireland to a Galician cathedral in northern Spain. With an appreciation for symmetry, the group — two writers, an artist and a stonemason — set off from St. James’ Gate in Dublin, on a passageway across the Irish Sea, the Atlantic’s edge, and…