John Cleese is a funny man. He’s been making us laugh for nearly 50 years — first in Monty Python’s Flying Circus, then his own sitcom Fawlty Towers and then in A Fish Called Wanda. No doubt he’ll have folks laughing Thursday night when he appears at Chicago’s Athenaeum Theatre to tell stories of his life, stories that show up in his autobiography “So Anyway,” which was recently released in paperback. Cleese shares some of those stories with us.