Added a functional/persistent List implementation.
Added a functional/persistent List implementation.

pandaforks/tido-rainbow,tn0502/rainbow,tn0502/rainbow,pandaforks/tido-rainbow,tn0502/rainbow,pandaforks/tido-rainbow,tn0502/rainbow,tn0502/rainbow,tn0502/rainbow,pandaforks/tido-rainbow,pandaforks/tido-rainbow