cujo updated to use bower.

Updated the Cujo demo to use Bower... kind of.

All of the Cujo components are available on Bower, so I've put them in the bower.json file. However, I didn't download them to bower_components and wire them up with the app yet. Trying to do a quick swap gave me a bunch of console errors, so I figured that task go to someone more familiar with Cujo, or I can try again some time.

I also made it JSHint happy, and caught some CSS stuff; with no todos remaining, #main and #todoapp are now hidden.