Adds hc_revalidation_personal.html: the turnover safety-net email plus a
personal guarantee card from Justin Hannah -- round headshot (links to /about so
readers can confirm a real person stands behind it), an italic satisfaction-
guarantee quote ('I will personally make it right... that is my promise'), a
rendered 'Justin Hannah' signature (Dancing Script, SIL OFL), and his title
(Founder & Principal Consultant). Signature image generated via PIL and added to
site/public/images/justin-signature.png. Test sent to justin@.
