Merge branch 'next'

* next:
  doc, present the API and command line tools in README.md
  doc, update the doc strings for some API decls
  hygiene, finish .name files with \n always
  chore, fix, make man pages depend on ggo file, instead of binary
  follow-up, adapt to changed iterator callback signature
  minor, change cb signature of iterator, stop upon values <0
  minor, rename --below to --pivot in rotz-cloud