title: How to customize look/feel of React Native ListView's RefreshControl
body: <p>React Native's ListView has a built-in pull-to-refresh control called <a href="https://facebook.github.io/react-native/docs/refreshcontrol.html" rel="noreferrer">RefreshControl</a>.  It's super easy to use.</p>
  
  <p>I'd like to customize the look and feel of the control to use a different visual design, such as using a material design progress indicator.</p>
  
  <p>How can I customize the look of the RefreshControl in React Native?</p>