Add jQuery example

This PR adds a jQuery example that is based on the [TodoMVC jQuery application](http://todomvc.com/architecture-examples/jquery/). Like with the Dojo example, it attempts to demonstrate unit tests, a functional test, conditional test module requires, asynchronous testing, and general Intern best practices.

A few notes:
* The JavaScript associated with this specific demo is not very testable at all. There are plans to improve this (see [this](https://github.com/tastejs/todomvc/issues/619), [this](https://github.com/tastejs/todomvc/issues/134), [this](https://github.com/tastejs/todomvc/issues/254), etc.) Until then, I moved the `Utils` object out of the `app.js` so we could unit test something.