update sqapi doc

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7187 8aca7d54-2c30-db11-9de9-000461428c89
FIX: minimap zooming

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7188 8aca7d54-2c30-db11-9de9-000461428c89