Start work on port of SunPath.
Merge branch 'master' of github.com:DynamoDS/Dynamo
Cache the data from a node's runtime mirror in OldValue.
Merge branch 'master' of github.com:DynamoDS/Dynamo

Conflicts:
	src/DynamoRevit/VisualizationManager/VisualizationManagerRevit.cs
Move sign-on handler registration outside of controller constructor.
Merge branch 'master' of github.com:DynamoDS/Dynamo