Dakota Fanning: if you’re reading this, run. Really, run. Run. It’s infectious. Get out now before it gets you too. Swine flu? No, this is much more dangerous. We’re talking about the pandemic of bewilderingly awful haircuts sweeping through the New Moon cast. Robert Pattinson we already knew about - but we could deal with his terrible haircut because it was an isolated case, plus there’s a chance that he’s being ironic or suffers from self-loathing or something. But now Kristen Stewart has done it too - her new haircut is half tatty scarecrow mullet and half barely-alive lawnmower-mangled c