updated dutch translation

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22315 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
update Polish translation (by yenidai)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22317 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
update Greek translation (by Zissis Papadopoulos)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22318 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
typo (thank you zissis)

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22319 4ae1f11a-8b86-4847-b8af-ab372f36d1fd