Please learn to use your friendly neighborhood spider-Google next time. This subject has been beaten to death. Some here: http://news.ycombinator.com/item?id=6

Please learn to use your friendly neighborhood spider-Google next time. This subject has been beaten to death. Some here: http://news.ycombinator.com/item?id=615846 http://news.ycombinator.com/item?id=615846 http://news.ycombinator.com/item?id=1175223 http://news.ycombinator.com/item?id=1175223 http://news.ycombinator.com/item?id=1578380 http://news.ycombinator.com/item?id=1578380 http://news.ycombinator.com/item?id=1787241 http://news.ycombinator.com/item?id=1787241 http://news.ycombinator.com/item?id=931832 http://news.ycombinator.com/item?id=931832 http://news.ycombinator.com/item?id=1758554 http://news.ycombinator.com/item?id=1758554 http://news.ycombinator.com/item?id=1840197 http://news.ycombinator.com/item?id=1840197 http://news.ycombinator.com/item?id=1756924 http://news.ycombinator.com/item?id=1756924 The search literally took maybe 3 seconds tops...