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
Stubs for getting the list of reachable nodes given a list of ASTs to execute

1. Stub functions
2. Integrate stub functions to PreviewInternal function in liverunner.
Adjust method resolution warning message
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Concurrent
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into VMGraphTools
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into VMGraphTools
Fix test cases TestVerifyRunTimeValues and Defect_MAGN_520_DS