   Libfile
   ~~~~~~~
   Purpose:  ALF linkable library constructor and maintainer

   Setup:
      Icon                    Action/Meaning                       Default
      ----                    --------------                       -------
      Library                 Name of library (typed or dragged).    nil
      File List               List of files or members               nil
                              (typed or dragged).
      Create                  Create a new library containing        on
                              files in <file_list>.
      Insert                  Insert files in <file_list>,           off
                              replace existing members of the 
                              same name.
      Delete                  Delete the members in <file_list>.     off
      Extract                 Extract members in <file_list>         off
                              placing in files of the same name.
      List library            List library.                          off

   Menu:
      Entry                   Action/Meaning                       Default
      -----                   --------------                       -------
      Symbol table            Add an external symbol table to        on
                              an object library.
      List symbol table       List symbol table.                     off
      Null timestamps         Use null timestamps when creating or   off
                              updating library.
      Via file            =>  Take additional arguments from         nil
                              via file.
