Brought back List Maximum/Minimum migration
Fixed test cases

- Dynamo.Tests.ListTests.LaceLongest_ListWith10000Element
- Dynamo.Tests.ListTests.RemoveFromList_Complex
Migration

- Migrated "Flatten Completely"
- Fixed the migration for "Model Curve"
- Deprecated the node "UV Domain"
Made Selection nodes to conserve Revit element data after migration
Added test cases for libraries node migration

- Reference Point
- Create Family Instance
- Model Curve
- Python Script
- Excel-reading nodes
Fixed migration function
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1
Merge pull request #1300 from ellensi/ChocoButter-2Become1

Various fixes for migration and test cases