FIX: correctly import trips-history for previous years

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6539 8aca7d54-2c30-db11-9de9-000461428c89
coding style

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6540 8aca7d54-2c30-db11-9de9-000461428c89
FIX mismatched new[] / delete

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6541 8aca7d54-2c30-db11-9de9-000461428c89
FIX: exporting of player finances to script was pretty much broken

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6542 8aca7d54-2c30-db11-9de9-000461428c89
FIX: finance_t::book_account also changes cash/net-wealth stats

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6543 8aca7d54-2c30-db11-9de9-000461428c89