Don't Ever Heckle... is a new column where Londonist interviews some of the most exciting and original comedians currently working on London's live comedy circuit. Don't ever heckle them, because we think they're great. Our second interview is with James Kettle, who in the past few years has taken his bitter, pessimistic anti-humour and frequently disturbing take on life to all the best clubs in London, as well as the Edinburgh Fringe, and even......