What kind of a heartless bastard refuses to kill a 13 year old kid? Uh…  wait…. From Uproxx.com: http://uproxx.com/tv/2014/07/george-r-r-martin-responds-to-a-heartfelt-letter-from-13-year-old-fan-asking-to-die-a-grisly-death/ Alas, I cannot promise you a grisly death in THE WIND OF WINTER. Those spots have already been filled by some very generous donors, and there’s a limit to how many people even I can kill. However,…