Merge pull request reactjs#89 from dance2die/issue70

Add minimum required Node version to create-react-app docs reactjs#70

Author: bvaughn

content/docs/installation.md

@@ -30,7 +30,7 @@ If you want to use it for a full application, there are two popular ways to get
 
 ## Creating a New Application
 
-[Create React App](http://github.com/facebookincubator/create-react-app) is the best way to start building a new React single page application. It sets up your development environment so that you can use the latest JavaScript features, provides a nice developer experience, and optimizes your app for production.
+[Create React App](http://github.com/facebookincubator/create-react-app) is the best way to start building a new React single page application. It sets up your development environment so that you can use the latest JavaScript features, provides a nice developer experience, and optimizes your app for production. You’ll need to have Node >= 6 on your machine.
 
 ```bash
 npm install -g create-react-app