New version of Agunua: you can know easily create gempub files

[Stephane Bortzmeyer]

Version 1.4 of the Agunua library has been released
<https://framagit.org/bortzmeyer/agunua/>. Among the interesting
things, the command-line tool geminitrack can now turn a capsule into
a gempub file. Gempub is a format for Gemini-like ebooks
<https://codeberg.org/oppenlab/gempub>.

Lagrange 1.4, released today, can read gempub files.

So, for instance:

geminitrack --gempub --maximum-files 100 gemini://foobar.example/

will produce a gempub, foobar-example.gpub, which you can easily read
offline.