RNDT: fixes in editing and CSW export.
- RNDT: fix namespace declarations in CSW full [etj]
- Small fixes for templates and additional fixes for metadata edit [tobia]
- Some fixes for keywords, thesaurus, topicCategory and others [tobia]
- Fixed the gml namespace version in export and csw present. [tobia]
- Removed the identifier element from the flat exceptions [tobia]
- Fix for gmd:voice [tobia]
- Fixed the gmd:date field in edit mode [tobia]