Add sample image

For showcase
há 2 anos · 77f48617db
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 # real-worldgen

 ![Sample Output](./docs/img/sample-output.png)

 Generate [Super Mario War](http://supermariowar.supersanctuary.net/) worlds from real-world data.

 ## Requirements
--- a/docs/img/sample-output.png
+++ b/docs/img/sample-output.png