fixed multivariate Levy, Carma, CP, and friends

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/yuima@334 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
completed Levy, also increment.L works

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/yuima@335 edb9625f-4e0d-4859-8d74-9fd3b1da38cb