http://roadtonerdvana.com/2014/05/04/tapity-tapper-my-ios-flappy-bird-clone-using-sprite-kit-game-over/
Merge remote-tracking branch 'origin/master'
http://roadtonerdvana.com/2014/05/04/tapity-tapper-my-ios-flappy-bird-clone-using-sprite-kit-game-over/