This has already been submitted before: https://news.ycombinator.com/item?id=13672742 https://news.ycombinator.com/item?id=13672742 (and flagkilled unfairly,

This has already been submitted before: https://news.ycombinator.com/item?id=13672742 https://news.ycombinator.com/item?id=13672742 (and flagkilled unfairly, but that's a different problem)