title: node-webkit won't run project file
body: <p>I started experimenting with nwjs ( node-webkit ) .
  But i seem to be doing something wrong i have 2 file in a folder :
  index.html </p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;Hello Node Webkit&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;h1&gt;Hello Node Webkit&lt;/h1&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>package.json</p>
  
  <pre><code>{
    "name": "myapp.helloworldapp",
    "version": "1.0.0",
    "description": "A test app",
    "main": "index.html",
    "scripts": {
      "test": "echo \"Error: no test specified\" &amp;&amp; exit 1"
    },
    "author": "",
    "license": "MIT"
  }
  </code></pre>
  
  <p>i zip up both files at ones ( i don't zip the folder ) and i rename the extention from .zip to .nw but nothing happens when i try to open it with the nwjs app . </p>
  
  <p>i'm working from a mac if that could have something to do with it ?</p>