title: Intl.js polyfill/shim with webpack?
body: <p>I'm using <a href="https://github.com/yahoo/react-intl">React-Intl</a> with <a href="https://github.com/webpack/webpack">webpack</a> and I need the <a href="https://github.com/andyearnshaw/Intl.js">Intl</a> shim to support Safari and IE, but I don't want to load it for browsers that already support the <a href="http://www.ecma-international.org/ecma-402/1.0/">Intl spec</a>.</p>
  
  <p>The polyfill is pretty huge (900kb), how can I ensure it only gets loaded in browsers that don't support it already?</p>