By Denny Dyroff, Entertainment Editor, The Times  Brandywine River Museum The Brandywine River Museum of Art (1 Hoffman’s Mill Road, Chadds Ford, www.brandywine.org) has been hosting a pair of special exhibitions since February 1 – “Votes for Women: A Visual History,” and “Witness to History: Selma Photography of Stephen Somerstein.” With regard to the former – if you snooze, you...