Add links to Bulgarian and Portuguese translations

Author: marijnh

html/index.html

@@ -101,4 +101,11 @@ <h2>Other pages</h2>
     <li><a href="http://eloquentjavascript.net/1st_edition">The first edition of the book</a></li>
   </ul>
 
+  <h2>Translations</h2>
+
+  <ul class=translations>
+    <li><a href="http://to6esko.github.io/">Български (Bulgarian)</a></li>
+    <li><a href="https://github.com/braziljs/eloquente-javascript">Português (Portuguese)</a></li>
+  </ul>
+
 </article>