#3 Implement fieldseparator/field and wordseparator/word in pipeline specs

[z/VMphile]

In Nrx-Pipelines, the specs stage lacks the ability to select words or fields of records, two of the primary uses of this stage which make rearrangement of fields in records fairly trivial; e.g.:

    pipe (fixTree)
  |    command /usr/bin/tree -apugsd {treePath}
  | r: take first 1                              -- The tree root
  | m: faninany                                  -- Merge the streams
  |    console
  ? r: specs fieldseparator [ field 2 next
                              field 1 nextword
  |    specs fieldseparator ] field 1 next
                              field 2 nextword
  | m:
-- ┌───────┐  ┌────┐              ┌────────┐┌───────┐ --
-- │command├r:┤take├────────────m:┤faninany├┤console│ --
-- └───────┘  │    │┌─────┐┌─────┐│        │└───────┘ --
--            │    ├┤specs├┤specs├┤        │          --
--            └────┘└─────┘└─────┘└────────┘          --

This can be accomplished without using specs, but the pipeline would be much more complicated.
Please consider making these capabilities available in the specs stage.

Leslie