Compliant: first version of assembly based on addMBKdx (rather than getStiffness that is deleted)
to be improved

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9996 b7f1a160-662a-0410-a6d8-bea165342f16
multi2mapping : change some function name : addInputModel to addInputModel1 & 2

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9997 b7f1a160-662a-0410-a6d8-bea165342f16