recommendation_movies()
        Return a list of recommended movies for specified one as a hash
        where each key is a movie ID in IMDB and value - movie's title:

                $recommendation_movies = $film->recommendation_movies();

        For example, the list of recommended movies for Troy will be similar
        to that:

                __DATA__
                $VAR1 = {                                                                                                                                 
                  '0416449' => '300',                                                                                                             
                  '0167260' => 'The Lord of the Rings: The Return of the King',                                                                   
                  '0442933' => 'Beowulf',                                                                                                         
                  '0320661' => 'Kingdom of Heaven',                                                                                               
                  '0172495' => 'Gladiator'                                                                                                        
                };