Hacker News on 4 September 2013

• Android is for startups
• How not to check the validity of an email address
• School is a prison and damaging our kids
• Warning: Google Authenticator upgrade loses all accounts
• AngularJS Tutorial: Learn to Build Modern Web Apps
• KitKat's new website
• Glare from London 'fryscraper' blamed for melting cars
• The New AWS Command-Line Interface
• N-gram Analysis of the New York Times Weddings Section
• Learn X in Y minutes where X = Go