Merged files from TheWorldIsFlat branch
Updated String test cases
Updated an inconclusive test case
Updated List test cases
Updated String test cases
Recorded test for custom node
Updated LibG
Merge branch 'ChocoButter-2Become1' into FlatTire
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into TestCases-CB2B1
Fix for connector bug (MAGN-2481)
Brought back UI tab file name updater
Made Excel app to show during runtime
Remove unnecessary exceptions
Merge branch 'ChocoButter-2Become1' into FlatTire

Conflicts:
	src/DynamoCore/UI/Converters.cs
Introduced "CodeBlockUtils" class and relevant test cases
Tweaked CodeBlockNodeModel to use the new "CodeBlockUtils" class
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1
Add the version selector application.
Merge branch 'ChocoButter-2Become1' into FlatTire