Syntax: getids <id>
   Function: Lists to the standard output the .mem, .grm, freeze, and arkive
             ids that are currently stored in the event .MEM file of the
             specified cusp_id.  (Freeze ids are stored in two places in the
             .mem file; bivector 0 and the FRZ tuple.)  Also lists the .mem
             file ids of all other events cloned from the specified id.

      Input: 1 required argument (integer).
             id = cusp_id of the event .MEM file (X<id>.MEM).