added #include conf.h and sysdep.h to all files, removed standard C lib 
includes (this was apparently a throw back to patch level 8).

change IS_DARK macro to:
#define IS_DARK(room)           (!world[room].light && \
                                 (world[room].room_flags.ROOM_DARK || \
                                  ((SECT(room) != SECT_INSIDE && \
                                    SECT(room) != SECT_CITY) && \
                                   (weather_info.sunlight == SUN_SET || \
                                    weather_info.sunlight == SUN_DARK))))


in act.item.c:
  af.bitvector = AFF_POISON;
replaces with:
  af.bitvector.AFF_POISON = 1;
in both do_eat and do_drink


