There was multiple discussions here on HN where you might find some answers. The most recent I found being: http://news.ycombinator.com/item?id=4673106 http://n

There was multiple discussions here on HN where you might find some answers. The most recent I found being: http://news.ycombinator.com/item?id=4673106 http://news.ycombinator.com/item?id=4673106