Add Fadable component

js/components/PageIndex.js

@@ -1,14 +1,15 @@
 import React from 'react';
 import HeroHeadline from './HeroHeadline';
 import QuadrantGrid from './QuadrantGrid';
+import Fadeable from './Fadeable';
 
-export default function PageIndex({ items, navigate }) {
+export default function PageIndex({ leaving, onLeave, items, navigate }) {
   return (
-    <div>
+    <Fadeable leaving={leaving} onLeave={onLeave}>
       <div className="headline-group">
         <HeroHeadline alt="Mar 2017">AOE Technology Radar</HeroHeadline>
       </div>
       <QuadrantGrid items={items} />
-    </div>
+    </Fadeable>
   );
 }