v0.17.1

Fixed

• audit-project PS-108 / PS-108b slug labels (#101). The violation tag
  that audit-all prints for these flat-package-layout rules used to read
  [PS-108 §1 readme-missing-license-badge] / [PS-108b §1 readme-missing-pypi-py-version-badge] — slugs from long-retired README
  rules that confused every reader of the audit output. PS-108 / PS-108b
  actually detect prefix-cluster mess and too-many-flat-py-files; the slugs
  now read src-prefix-cluster-mess and src-flat-py-files-over-threshold.
  Two AAA + one-assert regression tests guard the invariant that neither
  slug contains the word readme. No behaviour change beyond the printed
  label.