Nick Vivarelli International Correspondent Veteran auteur Mario Martone, whose Naples-set drama “Nostalgia” launched last year from Cannes, has quite a lot in common with Massimo Troisi, Italy’s beloved late comic actor-director who is best known internationally as the star of Oscar-winning film “Il Postino.” Which is why Martone was well-suited to direct the multi-layered doc about Troisi’s legacy “Somebody Down There Likes Me” that is screening in the Berlinale Special sidebar. For starters, they are both Neapolitan, and were born only a few years a part. Troisi – who in “Il Postino” played the simple postman who rides his bicycle on a sandy Italian island to deliver mail to his sole client, the Nobel Prize-winning poet Pablo Neruda – died tragically of congenital heart failure at age 41 in June 1994, the day after “Il Postino” finished shooting at Rome’s Cinecittà studios.