removed sub-range removal

individual indices that are out of range will still be removed
tests for List.Sublists
removed unused input from sublists node

accidentally added while toying with ideas
removed commented code
Fix mang-3188: dynamo hangs in opening for some custom node
Fix for MAGN-3622 - Set Element Parameter with ElementId StorageType
Fix MAGN-3785  Dynamo hangs after running Sample "Ref Grid Sliders"
Fix and simplify language block nesting

1. Handle codeblock count on codeblock constructor
2. Remove old code that handled codeblock nesting
3. Added imperative testcases for CBN
Remove comments
System layer diagram
code cleanup
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
unit tests for custom nodes
Test case fixes

Math.dll -> DSCoreNodes.dll
Merge pull request #1778 from Steell/sublists-tests

Sublists tests: MAGN-2450
test for compose ordering
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
Merge pull request #1823 from DynamoDS/testfixes

Test case fixes
Check if Element exists before removing in VisualizationmanagerRevit
Added unit test for setting Element parameter using Element argument, added some additional assembly resolvers