Adding bower support for dependencies

Notes:

* Of the options out there, I thought `grunt-bower-task` did a decent job of letting you selectively pull in just the files you need. It's not infinitely customizable, but it's way better than copying lots of whole/huge repos into dist.
* queue.js was moved to scripts/util since it's not browserified.
* I'd recommend eventually changing the require baseUrl from `scripts` to `src`, but I didn't want to deal with the brittle grunt+require+karma thing going on right now.
* I didn't re-hook up bootstrap in require because I didn't feel using their javascript was common enough to warrant being part of the boilerplate.