Other submissions on the same subject: http://news.ycombinator.com/item?id=1672391 http://news.ycombinator.com/item?id=1672391 <- This has lots of comments ht

Other submissions on the same subject: http://news.ycombinator.com/item?id=1672391 http://news.ycombinator.com/item?id=1672391 <- This has lots of comments http://news.ycombinator.com/item?id=1672388 http://news.ycombinator.com/item?id=1672388 <- This is an explanation http://news.ycombinator.com/item?id=1672346 http://news.ycombinator.com/item?id=1672346 <- First