Boyd Martin in competition at the London 2012 Olympics on his horse Otis Barbotiere. Photo courtesy Henry Bucklow/Lazy Photography Special dinner sponsored by Brandywine Ace/Oxford Feed & Lumber POCOPSON — How often do you have a chance to share dinner with an Olympic hero? But local residents will get that chance at a special dinner Oct. 23 at the critically acclaimed Stone Barn (100 Stone Barn...