Cleanup script that removes all files not under version control (svn).
Andy: This should clean up your dplR working copy. Call it in the dplR
directory. Try the -l option first.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@797 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Changed default behavior: prompt before every removal


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@798 edb9625f-4e0d-4859-8d74-9fd3b1da38cb