Translate to Spanish: home page

Author: alx741

_layouts/basic.html

@@ -42,6 +42,7 @@ <h2><a href="/en-US/contribute.html">Contribute</a></h2>
         <a href="/ko-KR/">한국어</a>,
         <a href="/pt-BR/">Português</a>,
         <a href="/ru-RU/">Русский</a>,
+        <a href="/es/">Español</a>,
         <a href="/zh-CN/">简体中文</a>
       </p>
     </footer>