add pointer to doc generation

README.org

@@ -45,7 +45,9 @@ dedicated to dense linear algebra.
 * Documentation
 
   There is no up-to-date documentation of Chameleon.  We would like to
-  provide a doxygen documentation hosted on [[https://about.gitlab.com/2016/04/07/gitlab-pages-setup/][gitlab]] in the future.
+  provide a doxygen documentation hosted on [[https://about.gitlab.com/2016/04/07/gitlab-pages-setup/][gitlab]] in the
+  future. Please refer to the section 2.1 of [[file:READMEDEV.org][READMEDEV]] to get
+  information about the documentation generation.
 
   The documentation of Chameleon's last release is available here:
   [[http://morse.gforge.inria.fr/chameleon/0.9.1/chameleon_users_guide-0.9.1.html][chameleon-0.9.1 documentation]].