clean debug

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11326 b7f1a160-662a-0410-a6d8-bea165342f16
add cat in SofaPython.Tools with test

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11327 b7f1a160-662a-0410-a6d8-bea165342f16
CGOGN extlib : fixed the assignment operator bug in the Cell class. Updated the traversor3, they now use cells. Updated the import function.

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11328 b7f1a160-662a-0410-a6d8-bea165342f16