Add "Macros vs Monads" by Jonathan Claggett and Chris Houser

May look better at https://docs.google.com/presentation/d/1z4w8PEx-aEqpxNwh8qJYy96fEt-ZbpoLTPpcDSJfBJ8/edit
Merge pull request #24 from LonoCloud/master

Add "Macros vs Monads" by Jonathan Claggett and Chris Houser