Node - need feedback

Hello,

Now that I got AMD support, I'm back to ask for Node support :-)

I run my tests in Node for simplicity of automation (also in the browser, but less automated) and would love to elide the complication of swapping knockout/knockout-deferred-updates.

So this PR has a package.json which will enable the use of npm, but actually the way that `window.setImmediate` is referenced is a problem in Node that is probably most easily solved by using https://github.com/NobleJS/setImmediate. I took a stab at a quick fix but didn't complete anything.

Let me know what your thoughts are on this whole idea. I just stalked the contributors to Node's own package.json and see you there, so I'm optimistic that you'll agree this is useful!

- Kenn