Script to add Whitehall slugs (one-shot)
Line up UK Hydrographic Office title with Whitehall
Normalise sites YAML

YAML rewritten according to Psych's idea of canonical

- removes indentation
- removes ---- from end of files
site_orgs_augmenter should add slugs for all sites

(not just organisations)
Add Whitehall slug for the organisation which owns each site
Dumb, poor-performing whitehall slug checker