Changeset 7744

#1331:

• added problem specific improvement operators (KnapsackImprovementOperator, TravelingSalesmanImprovementOperator)
• added custom interface (IScatterSearchTargetProcessor) for Scatter Search specific operators that use a target parameter
• added custom operator (OffspringProcessor) to process multiple children that were created by crossovers
• extracted diversity calculation and added problem/encoding specific operators (BinaryVectorDiversityCalculator, PermutationDiversityCalculator) for it
• added parameters and adjusted types
• adjusted event handling
• minor code improvements