insist that dependencies can be dynamic

contents/index.html

@@ -254,7 +254,9 @@ programmer with best flexibility:
   </ul>
   </p>
   <p>
-  These dependencies are computed in a completely decentralized way.
+  These dependencies are computed in a completely decentralized way, and can be
+  introduced completely dynamically as tasks get submitted by the application
+  while tasks previously submitted are being executed.
   </p>
   <p>
 StarPU also supports an OpenMP-like <a href="doc/html/DataManagement.html#DataReduction">reduction</a> access mode (new in v0.9).