Exclude some header files from test coverage checks.
Speed improvement for MCS generation.
Rename input tests from fault tree to risk.
Review of event and superset tests.
Rename FaultTreeAnalysisTest to RiskAnalysisTest.
Refactoring and initial test setup for Fault Tree.
Performance improvement for Probability Calculations.
Introduction of cut-off probability.
Closes #47.
Merge branch 'develop' into coverity-scan