Parsing applies

These are the applies used by the parse_command() efun, and also the new
parsing package:

<DL>
*  parse_command_adjectiv_id_list
*  parse_command_id_list
*  parse_command_plural_id_list
</DL>

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