Dutch translation for trunk updated by Pieter Nicolai (#13551)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11676 e93f8b46-1217-0410-a6f0-8f06a7374b81
Dutch translation changed by Pieter Nicolai (#13551)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11677 e93f8b46-1217-0410-a6f0-8f06a7374b81