WITH THE WINDING TITLE of her latest dance, Mapping a Forest While Searching for an Opposite Term of Exorcist, the choreographer Mina Nishimura suggests she’s looking for a role, a word, which she has so far grasped only by way of its inverse. As the audience filed into Danspace Project at St. Mark’s Church before the show, the work’s title was projected across one wall. If an exorcist expels spirits from a body, or a space, would Nishimura and her collaborators be inviting spirits in, summoning the supernatural into their bodies and the space of the church?It sometimes seemed that way, if