By: Addison Wylie Comedian/marijuana enthusiast Doug Benson has made it his mission to provide stoner versions of documentaries directed by Morgan Spurlock.  He started with Super High Me (a half-baked spin on Super Size Me) and continued with The Greatest Movie Ever Rolled (a take off on The Greatest Movie Ever Sold).  Benson checks off another title with Chronic-Con Episode 420: A New Dope, which isn’t just an obvious jab at Spurlock’s Comic-Con Episode IV:…