[Feature Request] Add a "Folder/Filesystem" view option

[casasfernando]

It would be nice to have "Folder/Filesystem" view of the library that will create the view based on files path rather than in metadata information. Windows Media Player has this view and I find it really useful, specially when your music library is not perfect in terms of metadata (large libraries can take ages to become perfect in this aspect).

This view should be pretty much the same as the current "Album" view but instead built from the filesystem hierarchy information. So let's say that a library is organized in Artist name/Album name/Songs the top view will show the artists (optionally with a picture of the artist identifying the folder or like WMP a picture of the different album covers overlapped) if you double clic then it will show the albums with a picture of their covers and then if you double clic the album songs list and the cover can be presented in the right panel as it is happening today.

Thanks.