new interfaces and implementations for result types
new contribution-result provider
new contribution result provider
adapted location contributions
adapted grouping result
added full result provider
new calculation methods for contribution results
new calculation methods in LcaCalculator
added common interface for base-result- and project-result-provider
added sorting and aggregation of contributions
fixed bug in simple result provider: results of input flows not adapted
fixed compile errors in IO package
result provider for Monte-Carlo-Simulations