Added migration functions

List functions, identity function, compose function, sliders, files,
conditionals, Newton roots
Merged conflict at dynBaseTypes.cs
Merged conflict at dynBaseTypes.cs
Merged conflict at dynBaseTypes.cs
Removed blank line to avoid conflict
Merge branch 'Migration' of https://github.com/Benglin/Dynamo into Migration

Conflicts:
	src/DynamoCore/Nodes/dynBaseTypes.cs
Added migration functions for DSColor and If
Added migration functions

- Circle
- Line
- Arc
Merge pull request #5 from ellensi/Migration

Looks fine in general, please address minor review comments and add them to subsequent pull requests. Thanks!