Array efuns

These efuns exist for the manipulation of array values:

<DL>
*  allocate
*  arrayp
*  filter_array
*  map_array
*  member_array
*  pointerp
*  sort_array
*  unique_array
</DL>

 Tim Hollebeek  Beek@ZorkMUD, Lima Bean, IdeaExchange, and elsewhere

