I realized this question was discussed on HN previously, http://news.ycombinator.com/item?id=2547254 http://news.ycombinator.com/item?id=2547254 but this submis

I realized this question was discussed on HN previously, http://news.ycombinator.com/item?id=2547254 http://news.ycombinator.com/item?id=2547254 but this submission is pointing to a specific answer.