John Bunyan’s famous Christian allegory is coming to theaters Easter weekend as an animated feature film. Watch the trailer: Written by John Bunyan in 1678, The Pilgrim’s Progress is one of the most enduring pieces of religious literature ever written. It’s been cited as the first novel ever penned in English, has been translated into over 200 languages, and has never gone out of print. At one point, the only book more popular than The Pilgrim’s Progress was the Bible.…