This is not an answer, but there is a previous discussion in a submission of mine: http://news.ycombinator.com/item?id=4136682 http://news.ycombinator.com/item?

This is not an answer, but there is a previous discussion in a submission of mine: http://news.ycombinator.com/item?id=4136682 http://news.ycombinator.com/item?id=4136682