HN links Apr 7, 2016

https://news.ycombinator.com/item?id=11433099

https://news.ycombinator.com/item?id=11436228

https://news.ycombinator.com/item?id=11440461

https://news.ycombinator.com/item?id=11435245


https://news.ycombinator.com/item?id=11432644