TODO: State & pattern matches
TODO: Separate compilation / Prelude
TODO: Add case binder removal transformation
-TODO: Remove all "statement"s
TODO: User-defined type classes (future work?)
TODO: Entity / Architecture / Component vs Function?
TODO: Expand on "representable"
TODO: Say something about implementation differences with transformation specs
TODO: Say something about the builtin functions somewhere (ref: christiaan)
TODO: Reorder future work.
+TODO: Future work: Use Cλash