added VarArg method info to VM and Importer
added VarArg node creation in graph UI
Updated references in "IronPythonEval.csproj" and "REVITAPI" in "CS.props"
Merge pull request #1147 from ke-yu/ChocoButter-2Become1

Fix MAGN-1342: custom node not evaluated in new session
Merge pull request #1146 from DynamoDS/ChocoButter2B1-VarArgs

VarArg methods create VariableInputNode instances in graph
fixed missing output in python script from string
implemented Min, Max, and Sort By Key
added some docs for DSVarArgFunction
Merge pull request #1148 from ke-yu/ChocoButter-2Become1

Use ReferenceEqualityComparer as comparer for FFI's CLFObjectMap
Fix defect in test setup
Included MS 2012 C runtime dll's for use with DesignScriptStudio.Renderer.dll, copy as part of post build event in DesignScriptStudio.Renderer build
Fixing more FFI tests
Merge branch 'ChocoButter-2Become1' of https://github.com/ikeough/Dynamo into ChocoButter-2Become1