Documentation update.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6752 8aca7d54-2c30-db11-9de9-000461428c89
FIX: one off bug in schedule selection

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6753 8aca7d54-2c30-db11-9de9-000461428c89