removed redundant NodeWithUI abstract class
tidying up some auto-formatting
Clean up DesignScript resource when shutting down
Merge pull request #962 from ke-yu/ChocoButter

Clean up DesignScript resource when shutting down
Merge branch 'ChocoButter' of github.com:ikeough/Dynamo into MultiAssemblyLoad

Conflicts:
	src/DSCoreNodesTests/NodeWithUITests.cs
	src/DSCoreNodesUI/NumberSlider.cs
	src/DSRevitNodesTests/Interactivity/SelectionTests.cs
	src/DSRevitNodesUI/DSSelection.cs