This is from the 0.4 branch of development. Our experimental releases
are derived from here.

Changes in AppImage Land: Our AppImage files now are signed and support
bandwidth-saving updates via AppImageUpdate. They no longer carry their
version in the filename because after an update, that would be a lie.

We now support installation via Flatpak for the 64-bit Linux client. Get
the stable versions from Flathub; our own repository has those and also
carries the usual test builds.