title: Incompatible node.js version
body: <p>I used to install <strong>node-png</strong>: <code>npm install node-png  -g</code></p>
  
  <p>I got a message says: </p>
  
  <blockquote>
    <p>npm WARN engine node-png@0.4.3: wanted: {"node":"0.8.x"} (current:
    {"node":"0.12.2","npm":"2.7.4"})</p>
  </blockquote>
  
  <p>How to fix it, note: <strong>I use earlier version</strong> ,,</p>