If you're developing with Node.js, just use NPM to add the tempura package.
$ npm install tempura
Alternatively, drop tempura.js in your browser by adding the following script.
<script src="http://nakamura-to.github.com/tempura/builds/0.0.4/tempura.js"></script>
For convenience, latest version is available by adding the following script.
<script src="http://nakamura-to.github.com/tempura/builds/latest/tempura.js"></script>