Helper stuff for rel.mgr, interactive m/p review.
Completed the review command, required extension of doctools::changelog. Needs linenoise for the REPL. Now we need a test run.
Tweaked review display, removed terminal graphics.
Rewrite of the review functionality ... Integrated scan, separate from readme.
Removed sak commands vcompare, rstatus, and note.
Completely replaced by "review" and "readme" now.
Tweaked "review"
  help reorg
  dropped clear+next
  next - now skips to next unreviewed package
  step is old next, single-step.
Merged sak review helper command (for release manager).
Merge review work to doc work