corrected SiteDefs.pm servername setting from www.gramene.org to ensembl.gramene.org
corrected SiteDefs.pm servername setting from www.gramene.org to ensembl.gramene.org

warelab/gramene-ensembl,warelab/gramene-ensembl,warelab/gramene-ensembl,warelab/gramene-ensembl,warelab/gramene-ensembl,warelab/gramene-ensembl