Hi,

When trying to import an album of an artist with '&' in their name (ex: Djihan & Kamien), i get a unique constraint-error from the Artist-model.
I can fix it by changing the following method:

public function setNameAttribute($value)
    {
        $this->attributes['name'] = html_entity_decode($value);
    }

to this:

public function setNameAttribute($value)
    {
        $this->attributes['name'] = $value;
    }

I'm not sure if i should send a PR for this, since you kind of mentioned the html_entity_decode is necessary in some cases. And seems it's only in some rare cases. Might have something to do with a weirdly formatted id3-tag. I'll try to find the file that caused the mayhem and update my report afterwards..