Also corr.series.seg() and series.rwl.plot() can now take a column
index in the 'series' argument, like ccf.series.rwl() earlier.  This
is now implemented in function pick.rwl.series(), found in helpers.R.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@823 edb9625f-4e0d-4859-8d74-9fd3b1da38cb