more intelligent default choice of xlim and ylim in iafplot()

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/surveillance@724 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updates salmNewport.RData so that names are in English

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/surveillance@725 edb9625f-4e0d-4859-8d74-9fd3b1da38cb