FIX: properly delete tunnel tiles, and do not leave empty tiles behind if smoke was on the tile

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7063 8aca7d54-2c30-db11-9de9-000461428c89
FIX: mark image dirty if deleting ways

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7064 8aca7d54-2c30-db11-9de9-000461428c89
FIX: fabrikbauer debug message crash

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7065 8aca7d54-2c30-db11-9de9-000461428c89
correct order for reading bridge parameters (spotted by Bernd Gabriel)

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7066 8aca7d54-2c30-db11-9de9-000461428c89
FIX problems with cliffs, double slopes, and draw_as_obj

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7067 8aca7d54-2c30-db11-9de9-000461428c89
Merge branch 'master' of https://github.com/aburch/simutrans.git into 112.5-merge
Changed: getter become inline
Changed: extracted methode karte_t::get_tiles_of_gebaeude() and karte_t::get_nearby_halts_of_tiles() from karte_t::generate_passengers_or_mail()
Enhanced: Performance
Merge branch '112.5-merge' of git@github.com:BerndGabriel/simutrans-experimental.git into 112.5-merge
Merge branch '112.5-merge' of git://github.com/BerndGabriel/simutrans-experimental.git into 112.5-merge