* Extended AssessmentSection with Composition property to denote the type of elements found in the assessment section. * Extended FailureMechanismContribution with ability to change contribution distribution. * Updated SemiProbabilisticPipingInput.Contribution to be in line with FailureMechanismBase.Contribution. Related to Issue [WTI-409] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@2817 5a3db67b-de53-47b5-99c8-a1c30a6650e2