CODE: ist_in_gittergrenzen and ist_in_kartengrenzen translated name and documented.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6299 8aca7d54-2c30-db11-9de9-000461428c89
some reformatting

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6300 8aca7d54-2c30-db11-9de9-000461428c89