Issue #623

Now generates author pages with urls in form name/id

for most people this looks like:
 people/d/david-chiang/david-chiang/

Matt Post has an ORCID in name_variants.yaml, so his page is:
 people/m/matt-post/0000-0002-1297-6794/

and then there is:
 people/y/yang-liu/yang-liu-edinburgh/
 people/y/yang-liu/yang-liu-ict/
 people/y/yang-liu/yang-liu-icsi/
 people/y/yang-liu/yang-liu-umich/

I don't know how to make the old URLs people/m/matt-post/ resolve.