Fix titles.

	* doc/contributors.dox,
	* doc/license.dox,
	* doc/license_commercial.dox,
	* doc/mainpage.dox: Here.

ChangeLog

+2012-02-27  Guillaume Lazzara  <z@lrde.epita.fr>
+
+	Fix titles.
+
+	* doc/contributors.dox,
+	* doc/license.dox,
+	* doc/license_commercial.dox,
+	* doc/mainpage.dox: Here.
+
 2012-02-27  Guillaume Lazzara  <z@lrde.epita.fr>
 
 	Add a description about Olena.

doc/contributors.dox

-/** \page Contributors List of contributors
+/** \page contributors Contributors
 
   \htmlinclude contributors.html
 

doc/license.dox

-/*! \page gplv2 "GNU General Public License (GPL)"
+/*! \page gplv2 GNU General Public License (GPL)
 
 Olena and its modules are Copyright (C) 2011 EPITA Research and
 Development Laboratory (LRDE).

doc/license_commercial.dox

-/*! \page commercial "Commercial Use"
+/*! \page commercial Commercial Use
 
     Even though Olena is released under GPL v2, using Olena in a close
     source commercial products may be possible.

doc/mainpage.dox

@@ -14,7 +14,7 @@
       <td>
 	\li \ref about
 	\li <a class="el" href="http://www.lrde.epita.fr/cgi-bin/twiki/view/Olena/Publications">Bibliography</a>
-	\li <a class="el" href="a00028.html">Contributors</a>
+	\li \ref contributors
       </td>
       <td>
         \li \ref moduleslist