Removed the CalculationUnit class
Fixed the statistics tests
Added a RiskModel class
Added QA tests on the event loss table
Now the epsilons can be passed from outside
Changed the signature of ProbabilisticEventBased.__call__
Fixed the BCR calculators
VulnerabilityFunction.apply_to and all calculators have now a functional interface
Introduced an assert_similar
Fixed two docstrings
Merge pull request #66 from gem/remove-CalculationUnit

Remove CalculationUnit