svn merge svn.openlayers.org/trunk/openlayers/@2230 svn.openlayers.org/trunk/openlayers/@2233 svn.openlayers.org/branches/openlayers/2.3/
#480 Grid funkiness
#491 improper URL encoding of LAYERS list in WMS GetMap request
#500 layer.destroy() should remove itself from the map but not set new baselayer
git-svn-id: http://svn.openlayers.org/branches/openlayers/2.3@2234 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf