Update README.md

Author: kerautret

README.md

@@ -1,6 +1,5 @@
 DGtalTools
 ==========
-
 DGtalTools is a separate github project containing tools constructed
 using DGtal library. The main goal of this part is to gather simple
 and useful tools exploiting the structures and algorithms defined in
@@ -243,3 +242,4 @@ Galleries
    </tr>
    </table>
    </center>
+(test doc)