more tz fixes and allow wd option in percentileRose

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/openair@850 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
update description


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/openair@851 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
description again

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/openair@852 edb9625f-4e0d-4859-8d74-9fd3b1da38cb