RequireJS + Bower

Did a lot of updates here. This is a bit of a mega pull request. This does:

- adds RequireJS support
- adds a sample module, defined through RequireJS
- shows a Handlebars example too
- shims Underscore and Handlebars to work with RequireJS
- sample Bower component.json and .bowerrc file to set it up
- Removes Breaking Bad references (apart from a couple on the HTML page :dancers: )
- Doesn't come with the js/vendors stuff on it, because the idea is the user pulls this down and runs `bower install`

Ben, I'd suggest before merging it you clone a copy from my repo and check it out, make sure you're happy with it first.