Fixed eesPlot error.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@207 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Modified man page; Work in progress

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@208 edb9625f-4e0d-4859-8d74-9fd3b1da38cb