Notifications used in Libervia.

All the sounds in this repository can be copied or redistributed freely. Note that the
licenses here apply only to this directory and specified files.

Here are the origins of the notifications:

`music-box.mp3` comes from <https://freesound.org/people/breebles/sounds/487029/>, it is
made by "breebles" and is licensed under Creative Commons 0 License (CC0).

`ring_1.wav` comes from <https://freesound.org/people/SamuelGremaud/sounds/459403/>, it is
made by "SamuelGremaud" and is licensed  under Creative Commons 0 License (CC0).

Creative Commons 0 License can be read at
<https://creativecommons.org/publicdomain/zero/1.0/>