handle the special case .shp.xml metadata naming convention
docs for geoserver dbclient configuration

refs #123
Merge pull request #954 from ischneider/iss-123-add-dbclient-docs

docs for geoserver dbclient configuration
Merge pull request #953 from simod/issue-921

handle the special case .shp.xml metadata naming convention
Optional configiguration in order to use postgres database in Ubuntu 12.04
Merge remote-tracking branch 'geonode-original/master'