/// <summary>
/// Constructeur
/// </summary>
/// <param name="name"></param>
/// <param name="length"></param>
public Song(string name, Time length) : this(name, new Artist(), length)
{
}
/// <summary>
/// Constructeur
/// </summary>
/// <param name="name"></param>
/// <param name="artist"></param>
/// <param name="length"></param>
public Song(string name, Artist artist, Time length) : this(name, artist, length, new Album())
{
}