From left: Pierre Adeli (Mr. Zero) and Mariana Jacuzzi (Ms. Devore) in "The Adding Machine" at The Actors' Gang (Photo by Bob Turton Photography) How do you enslave yourself? What soulless thing do you regularly do because you believe you have to, even though it detracts from your sense of life’s beauty and joy? Despite its calculating title, those are the questions behind “The Adding Machine,” boldly staged by The Actors’ Gang through this weekend. Creatively directed by Cih