Add option to allow custom storage layout

[wireva]

I would like to use this tool to download songs into my Navidrome library. It works really nice, but the default storage layout is not very usable for that. I would need a way to store all songs, no matter their download method, as /. Also it would be nice to be able to configure the album names, currently it includes the artist name ("Artist - Album" instead of "Album")

[wireva]

https://git.wireva.eu/wireva/deezer-downloader/commit/407e198423388782f82753139165a1b60a6f101f

I created a fork for this, its very custom to my specific need and not a general solution, but maybe someone finds it helpful