Update README.md

chrisamaphone · web-flow · commit 6096c26de92a · 2019-04-15T10:17:33.000-04:00
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 # pcg-fp
 Tinkering with creating a functional programming language for procedural content generation.
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+[Design document](https://docs.google.com/document/d/1yoQqZrVah0TXHAcETi4QIyr48cril_crmiTs_87vmTo/edit?usp=sharing)
