added the wilson score formula which is used to determine the 'best' rated item which determines the lower bound instead of using a plain average rating sort
added the wilson score formula which is used to determine the 'best' rated item which determines the lower bound instead of using a plain average rating sort

jgabriellima/recommendationRaccoon,dtannen/recommendationRaccoon,guymorita/recommendationRaccoon,gabe-alex/recommendationRaccoon