rename Rcmdr directory to Rcmdr-old

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@499 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
rename Rcmdr2 directory to Rcmdr-current. John

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@500 edb9625f-4e0d-4859-8d74-9fd3b1da38cb