Use the InternalSetReferencePlane method to set the reference plane.
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Merge branch 'ShutdownSequence' into Concurrent
Merge branch 'ShutdownSequence' into Concurrent
Merge branch 'BuildFix' into Concurrent
Implemented "PreShutdownCore" for shutdown sequence with scheduler
Implemented "DeleteKeeperElementOnce" for shutdown sequence with scheduler
Removed unwanted methods from "IdlePromise" stub class
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Cleared node warnings in "UpdateGraphAsyncTask.HandleTaskCompletionCore"
Merge branch 'ColorRangeFix' into Concurrent
Merge branch 'ShutdownSequence' into Concurrent
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent

Conflicts:
	src/DynamoRevit/DynamoRevit.cs
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Replaced "DynamoRevit.RevitUIApplication" with "DocumentManager.CurrentUIApplication"
Remove outdated migration test.
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent