* adding new avatars by David Revoy
* replacing old avatars to test
TODO: add a settings to choose between legacy and new avatars.
TODO: generate a bot avatar.
* For now, only one avatar possible,
* uses mod_random_vcard_peertubelivechat,
* mod_random_vcard_peertubelivechat has a new option with the avatar
list (instead of a hardcoded avatar number)
* Peertube lists available avatars files, and pass it to mod_random_vcard_peertubelivechat
Moving `public/images` dir to `assets/images`, because it conflicts with gitlab CI/CD for documentation.
Moving `assets/styles.css` to `assets/styles/styles.css`.
Related to #117.
