Create README.md

Author: IsaacMarovitz

Diff for: README.md

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+# whisky-book
+
+Documentation for Whisky.
+
+### How to Contribute
+1. Install [rust](https://www.rust-lang.org/tools/install)
+2. Install mdbook and the required preprocessors
+   ```
+   cargo install mdbook
+   cargo install mdbook-alerts
+   cargo isntall mdbook-template
+   ```
+3. You can preview changes to the book with `mdbook serve --open`