Begin implementing new website

www/src/pages/404.js

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+import React from 'react';
+
+const NotFoundPage = () =>
+    <div>
+        <h1>NOT FOUND</h1>
+        <p>You just hit a route that doesn&#39;t exist... the sadness.</p>
+    </div>;
+
+export default NotFoundPage;

www/src/pages/index.js

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+import React from 'react';
+import Link from 'gatsby-link';
+
+const IndexPage = () =>
+    <div>
+        <h1>Hi people</h1>
+        <p>Welcome to your new Gatsby site.</p>
+        <p>Now go build something great.</p>
+        <Link to="/page-2/">Go to page 2</Link>
+    </div>;
+
+export default IndexPage;