Initial checkin of Dutch language through separate file that may be integrated into the main source.xml through the build process. As discussed with Grahame. This checkin contains Dutch only, but could be extended to include other languages.

git-svn-id: http://gforge.hl7.org/svn/fhir/trunk/build@3603 2f0db536-2c49-4257-a3fa-e771ed206c19