ADD: departure board to halt_info

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6462 8aca7d54-2c30-db11-9de9-000461428c89
Remove double entires when using via menge

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6463 8aca7d54-2c30-db11-9de9-000461428c89