Add dutch l10n of trow logo

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56193 75b3775d-3801-0410-9e12-e2e43121521d
Dutch l10n for main logo. In both locations.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56194 75b3775d-3801-0410-9e12-e2e43121521d