INHERITANCE
An object can inherit all variables and functions from another object.
This is done with the declaration 'inherit "file";'. This must come before
any local variables or functions.
An example, defining a monster:
inherit "obj/monster";
reset(arg) {
::reset(arg);
set_name("troll");
set_level(9);
set_hp(100);
set_wc(12);
set_al(-60);
set_short("A troll");
set_long("It is a nasty troll that looks very aggressive.\n");
set_aggressive(1);
}