Renew GPG public key
Update copyright year
Update gmi screenshot
Add my Matrix address
Add my XMPP address
Add ‘clean’ rule to Makefile
Add cat-tabby-brown-white.jpg

Adorable fluffy cat spotted near Abbeydale Rd in Sheffield, where I
once lived.  He or she ran off soon after I shot this!
Reword licence page
Remove some photos
Provide a canonical path for each page
Add “Skip to content” link
Cite uBlock Origin works best on Firefox
Import photos of diego, merle and Al bar end plug
css: Make header links for prominent
Reorganise navigation links
Use h1 instead of h2 for posts page body title
Add projects page with gmi, pathmenu, kak plugins
Say "free" file formats instead of "open"

I didn’t know this until now, but it seems like the two are different
in subtle but important ways:

Both kinds of file format may be used and implemented by anyone.
However, open formats may be encumbered by copyright, patents or
trademarks whereas free formats must not.