* Makefile: add support for gcc-4.8 and AddressSanitizer
* bauer/hausbauer.cc: call check_road_tiles(true) explicitly before destroying part of the building. Ugly, but fixes a segfault
* dings/gebaeude.cc: check_road_tiles: add plenty of debugging messages, properly deregister roads that changed height. Fixes a segfault, but really ugly.
* dings/gebaeude.cc: remove debugging code
* dings/gebaeude.cc: disable commuter counting code, which is only for debugging