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Merge pull request #16 from ChrisMissal/contrib

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Add comment to demo teamcity
Remove irrelevant comment.
Extract CaseResult from Case, a step toward making Case immutable.
Add CaseStatus enum: Pass, Fail.
Simplify FailResult and PassResult by constructing for a given CaseResult. CaseResult determines its own CaseStatus.  Phase out deprecated Case.Exceptions property.
Phase out deprecated Case.Duration and Case.Output properties.
Rename CaseResult to CaseExecution.
Rename CaseStatus to CaseResult.
Rename local variable for accuracy.
Consolidate test code that looks up methods by name.