fill loadType attribute

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11336 b7f1a160-662a-0410-a6d8-bea165342f16
take care of vtu

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11337 b7f1a160-662a-0410-a6d8-bea165342f16
default normal and texture index must be 0

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@11338 b7f1a160-662a-0410-a6d8-bea165342f16