Test it with Zuul, package with npm, include html5shiv

[shawnbot]

These commits introduce a zuul configuration and get everything up to snuff for automated testing with IE8 and IE9 via Sauce Labs.

Most of this work involves just getting the tests running in zuul, but some also involve forking ie8 and patching it to:

1. work in IE9: IE9 doesn't like the Comment and Text nodeValue shims WebReflection/ie8#14
2. work with browserify, which zuul uses to bundle scripts for testing

My first approach with ie8.js was just to monkeypatch it so that the offending lines were stripped from aight.js, but this didn't work for long. Once I got it working in IE9 I noticed that the Text#nodeValue shim was busted, and returning early from the shimming function was the simplest way to sidestep the issue. I also added some aliases between DOM interfaces to simplify other shims.

We've also got a package.json for use with npm, which lists the dev dependencies necessary (and some handy script tasks) for both bundling and testing. To test, just do this:

$ npm install --dev
$ npm run test:local

Zuul wil spit out the URL for local testing, e.g. http://localhost:8080/__zuul. Crack open a browser and paste that URL to run the tests interactively. I've been using VirtualBox and ievms to run the Internet Explorer tests (note that from within VirtualBox you will need to access the URL as http://10.0.2.2:8080/__zuul), and as of d670123 the tests pass in both IE8 and 9.

To run the automated tests, follow these instructions for telling zuul where to find your Sauce Labs credentials, then run:

$ npm test

This may take a few minutes, but you should eventually see some output that looks like this:

The npm run watch task is useful for rebuilding the generated files when you work on the source, and npm run watch:test restarts the local zuul test server whenever the generated files or tests are modified.

Oh, and we're including html5shiv now too, so that's cool.