Parse a file's Metadata on register

[Arthi-chaud]

On file registration (#2), its metadata should be parsed and added to the database

[Arthi-chaud]

The metadata parsing method should work the following way:

• Parse the metadata from the file path. The RegExp from the setting file must provide information by group names
• Parse the metadata embedded in the file
• If the album name differs from the release folder's name, the later should be used, as it implies it's unique