Adding a Simple Translation Tool

It is part of the cloud services available with gf -server.

src/www/index.html

@@ -15,6 +15,7 @@
   <li><a href="minibar/minibar.html">Minibar</a>
   <li><a href="TransQuiz/translation_quiz.html">Translation Quiz</a>
   <li><a href="gfse/">GF online editor for simple multilingual grammars</a>
+  <li><a href="translator/">Simple Translation Tool</a>
 </ul>
 
 <h2>Some Documentation</h2>