Also posted https://news.ycombinator.com/item?id=19250060 https://news.ycombinator.com/item?id=19250060 (after this post) and https://news.ycombinator.com/item?

Also posted https://news.ycombinator.com/item?id=19250060 https://news.ycombinator.com/item?id=19250060 (after this post) and https://news.ycombinator.com/item?id=19247613 https://news.ycombinator.com/item?id=19247613 (before this post).