Increase artist/title check for single songs to prevent matches such as the following
"Jimmie Rodgers - Together" is matched to "Jimmie Rodgers - Let's Stay Together"
"Johnny Mathis - Come Back" is matched to "Johnny "Country" Mathis - If You Should Come Back Today"
"Rush - Happy" is matched to "DJ Rush - Snare Happy"
but of course we only want to adjust this slightly cause could prevent some good matches, impossible to get it right for all circumstances
and the threshold for artist match should be higher than title match, as less to go wrong with an artist name
and also increase mimimum track score when single song matching.
Done as described