Refactor transformation steps.
Rename Walker to BuilderBase.
Notes, and test prototype.
Change @block to @scope.
Start attempt of refactoring FunctionTransformer.
Fix named IIFE.
Fix recursions.
Update debugging provisions.
Cleanups.
Docs cleanup.
Merge branch 'feature/refactor_transformation_runs'

* feature/refactor_transformation_runs:
  Docs cleanup.
  Cleanups.
  Update debugging provisions.
  Fix recursions.
  Fix named IIFE.
  Start attempt of refactoring FunctionTransformer.
  Change @block to @scope.