[issue #47] bed rating will only be improved if there is at least one criteria
[issue #47] separated the single rating topics from the overall rating
[issue #47] applying the different topic ratings before the overall rating in accordance with the adapted Calc
[issue #47] all ratings are removed during initialisation to ensure that there will not be any wrong values due to changes made
[issue #47] minor jalopy format
Merge branch 'feature/47-rating-adaptions-separation-of-overall-ratings' into dev