Add ability to display revisions

js/components/PageIndex.js

@@ -1,15 +1,18 @@
 import React from 'react';
+import { formatRelease } from '../date';
+
 import HeroHeadline from './HeroHeadline';
 import QuadrantGrid from './QuadrantGrid';
 import Fadeable from './Fadeable';
 import SetTitle from './SetTitle';
 
 export default function PageIndex({ leaving, onLeave, items, navigate, ...props }) {
+  const newestRelease = props.releases.slice(-1)[0];
   return (
     <Fadeable leaving={leaving} onLeave={onLeave}>
       <SetTitle {...props} title="Technology Radar" />
       <div className="headline-group">
-        <HeroHeadline alt="March 2017">AOE Technology Radar</HeroHeadline>
+        <HeroHeadline alt={formatRelease(newestRelease)}>AOE Technology Radar</HeroHeadline>
       </div>
       <QuadrantGrid items={items} />
     </Fadeable>