Updates in French translations for base and recommended packages for R 3.1.0

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rfrench@30 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
VR and survival eliminated

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rfrench@31 edb9625f-4e0d-4859-8d74-9fd3b1da38cb