Update changelog and version for 0.22.3 release

Update changelog and version for 0.22.2 release

Update changelog and version for 0.22.1 release

Revert "Tweak app summary"

This reverts commit 7360420.

There are a lot more spin-off games than I realised, so "most"
is wrong!

Set version number to 0.21.0

Fix building release

Update changelog and version number for 0.19.1 release

I forgot to update the version number for 0.19.0...

Update 0.19.0 release date in changelog

Update install location detection description

Add missing changelog entries