Move output to XML element (with CDATA) instead of XML attribute
Update HTML.xslt to include output and traits
Compensate for the CLR team's inability to properly understand NuGet
add InvokeTestMethodAsync to XunitTestRunner to allow inheritors to reuse test output handling
refactor: remove cancellationThunk from AcceptanceTest - YAGNI
Remove Assert.None (duplicate of Assert.DoesNotContain). Fixes #232