Mutation tests have been added
Updating mutation tests according to the Sharad's recommendations
CopyNode and List tests were added
fixed failing Repeat test
fixed failing custom nodes tests
removed unnecessary code from unit tests
cleanup
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into unit-test-unshittification

Conflicts:
	test/DynamoCoreTests/DSEvaluationTest.cs
Adding Custom Node mutation tests
Updating double/integer mutation test
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into unit-test-unshittification
added watch object handling for Revit
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into MVVM

Conflicts:
	src/DynamoCore/ViewModels/DynamoViewModel.cs
	src/DynamoRevit/ViewModel/RevitWatchHandler.cs
Fix MAGN-4095 Getting crash while running Document after closing and reopening again.
Fix MAGN-3140
Updated scheduler/async task namespace to "Dynamo.Core.Threading"
Added initial implementation of "DynamoSchedulerThread"
Implemented RevitSchedulerThread, referenced DynamoCore in RevitServices
Implemented a new "TimeStamp" struct for time keeping.
Merge branch 'SchedulerThread' into Concurrent