nacopula has been merged into copula and archived on CRAN

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ctv@1993 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
EVER archived on CRAN

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ctv@1994 edb9625f-4e0d-4859-8d74-9fd3b1da38cb