add #include conf.h and sysdep.h to all files, remove standard C lib includes.

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, search for:
  af.bitvector = AFF_POISON;
and replace with
  af.bitvector.AFF_POISON = 1;
(there should be two occurances of this).

search for ITEM_WEAR_*
