private List<ArticleRecommender> GetPreporuka(Article a)
 {
     Preporuke.ItemPreporuka ip = new Preporuke.ItemPreporuka(a);
     return ip.GetArtikliPreporucine();
 }
 private List<QuestionRecommender> GetPreporukaPitanja(Question q)
 {
     ItemPreporuka ip = new ItemPreporuka(q);
     return ip.GetQuestionsPreporke();
 }