port to MVC framework

[garrett]

While I like spine.js, I think there's a larger community around backbone... my concern with the underscore library is valid (name clashing with _() in Studio, for instance), but I figured out a workaround today, so I think we should use it (backbone).

Basically, we'd need to load it at the beginning of the scripts, like so:

<script src="underscore.js"></script>
<script src="backbone.js"></script>
<script>
  _.noConflict();
</script>

That script block can be replaced with a file only containing that one line. If we'd like to actually use underscore outside of backbone, we can alias it to something else, like so:

window.underscore = _.noConflict();

or

window.U = _.noConflict();

Then, we'd be able to use underscore (if we wanted), like so: U([1,2,3]).map(function(){}) or U.map([1,2,3], function(){});

Still, I prefer sugar.js to underscore. (:

Also, underscore's functions are available within backbone's collections:
http://documentcloud.github.com/backbone/#Collection-Underscore-Methods

I therefore think we should consider backbone for Cardboard.