Make TypeUtility public (and the public methods extension methods).
Support for ancient 1.1

NullReferenceException otherwise
Remove rethrow information from xunit1 exception
Ensure TestCases in messages is serializable
#150: Ease v1 -> v2 migration.
#146: Handling ITestCaseStarting and ITestCaseFinished events.
Fix Xamarin runner issues.
#108: MSBuild runner: source line information not always present
Fix issue where grand totals could be longer than the longest individual total.