Hacker News on 8 September 2015

• Node v4.0.0
• Neocities is implementing IPFS – distributed, permanent web
• Immersive Linear Algebra – A free interactive online book
• Raspberry Pi touch display
• Inside Popcorn Time – the world's fastest growing piracy site
• TSA Master Keys
• A Beginner’s Guide to Recurrent Networks and LSTMs
• Flexbox in 5 minutes
• Decline of play and rise of sensory issues in preschoolers
• San Francisco Should Always Have a Subway Under Construction