SET&QUERY - room.c

query_property(s): If this function is called without arguments, it returns
                   the properties of the room. Otherwise it returns true if
                   s is one of the properties, or 0 otherwise.
                   Example: 
                   environment(this_player())->query_property("no_fight"_);
query_dest_dir(): This returns the array dest_dir, which contains all rooms
                  connected to this one, and the direction they are in in the
                  format room/direction/room/ect.
query_long(): This returns the long description of the room.
query_drop_castle(): This returns 1 if it's not allowed to put your castle
                     here. Otherwise it returns 0.
