Thanks to Diane “The PandaPack Winner” Shedd, DCist was alerted to this incredibly sad account posted on craigslist of poor Julie G’s cat Mittens, who may have bit the big one earlier today, according to her not-very-subtle neighbor, Steve Y. Hey Julie G, it’s Steve Y– your next door neighbor. I remeber you telling me that you read these. Sorry I don’t have your cell or work e-mail, but I think your cat’s dead. I…