This article has been discussed before. The last submission is only 20 days old. http://news.ycombinator.com/item?id=1191534 http://news.ycombinator.com/item?

This article has been discussed before. The last submission is only 20 days old. http://news.ycombinator.com/item?id=1191534 http://news.ycombinator.com/item?id=1191534 http://news.ycombinator.com/item?id=757204 http://news.ycombinator.com/item?id=757204