Updated documentation for helpers in unit test project
Use Single() instead of First() to better express intent
Update test helpers to use asynchronous methods
Fix spelling errors in comments
Suppress warning 1591 (missing XML documentation) in test project
Remove unused template code
Ignore test results output folder
Merge pull request #279 from sharwell/test-code-cleanup

Test code cleanup
Add generated stubs for diagnostic analyzers
Add initial .gitattributes
Merge pull request #284 from sharwell/gitattributes

Add initial .gitattributes
Merge pull request #283 from sharwell/stub-analyzers

Add generated stubs for diagnostic analyzers
Suppress SA1010 when SA1026 will be reported for the same whitespace error (fixes #250)