Vendor dependencies

Let's see how I like this workflow.

vendor/wasm-bindgen/guide/src/examples/index.md

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+# Examples of using `wasm-bindgen`, `js-sys`, and `web-sys`
+
+This subsection contains examples of using the `wasm-bindgen`, `js-sys`, and
+`web-sys` crates. Each example should have more information about what it's
+doing.
+
+These examples all assume familiarity with `wasm-bindgen`, `wasm-pack`, and
+building a Rust and WebAssembly project. If you're unfamiliar with these check
+out the [Game of Life tutorial][gol] or [wasm pack tutorials][wpt] to help you
+get started.
+
+The source code for all examples can also be [found online][code] to download
+and run locally. Most examples are configured with Webpack/`wasm-pack` and can
+be built with `npm run serve`. Other examples which don't use Webpack are
+accompanied with instructions or a `build.sh` showing how to build it.
+
+Note that most examples currently use Webpack to assemble the final output
+artifact, but this is not required! You can review the [deployment
+documentation][deploy] for other options of how to deploy Rust and WebAssembly.
+
+[code]: https://github.com/rustwasm/wasm-bindgen/tree/master/examples
+[gol]: https://rustwasm.github.io/docs/book/
+[deploy]: ../reference/deployment.html
+[wpt]: https://rustwasm.github.io/docs/wasm-pack/tutorials/index.html