title: How to customize the window title bar of an Electron app?
body: <p>I'm getting started working with <a href="http://electron.atom.io">Electron</a> to build a desktop app. How can I customize the window title bar (which contains the close, minimize, and full screen buttons) to add custom views? Safari is an example that I am thinking of:</p>
  
  <p><a href="https://i.stack.imgur.com/xgS3S.png"><img src="https://i.stack.imgur.com/xgS3S.png" alt="safar title bar"></a></p>