Revert to describing the chapter 
Revert to describing the chapter 
shapeshed/nodejsbook.io.examples,nuriozalp/nodejs,webskyer/nodejsbook.io.examples,shapeshed/nodejsbook.io.examples,xkris6x/nodejsbook.io.examples,nuriozalp/nodejs,AlexGach/nodebook,xkris6x/nodejsbook.io.examples,tim-qian/nodejsbook.io.examples,webskyer/nodejsbook.io.examples,AlexGach/nodebook,tim-qian/nodejsbook.io.examples,shapeshed/nodejsbook.io.examples