Almost halfway through February, three soundtracks from titans of film composing have been released by the fine folks at Intrada and La- La Land Records. On Monday, Intrada's latest archival soundtrack was announced: an expansion of James Horner's score to the hit An American Tail. Directed by Don Bluth (The Secret of NIMH, All Dogs Go To Heaven) and produced by Steven Spielberg, this movie--one of the few mainstream animated films of the '80s not produced by Disney--tells the story of Fievel