do not utf8 encode metadata string
do not advertise CSW metadata links within a metadata document itself
remove the update categories command, no longer needed.
put back the default category
Merge pull request #942 from simod/reenable-default-category

Re enable the default category
Set language for GeoExt
Merge branch 'master' of github.com:GeoNode/geonode
Merge branch 'master' of github.com:GeoNode/geonode into dev