xskel.ccf.plot(): optimizations in code, small changes to output.
NAMESPACE: import more functions from grid


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@872 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
note about importing from grid

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@873 edb9625f-4e0d-4859-8d74-9fd3b1da38cb