Adding in some basic bootstrap markup/css for prettification.

This adds in bootstrap css and some basic markup to make your form look prettier. I also moved the conditional messages to appear after the labels which I think looks (and acts) much nicer.

This only took a few minutes and I wouldn't be offended if you didn't want to use these changes, but submitting them for your consideration nonetheless.

Here's a screenshot of the end result of the changes:
![angularjs form 2013-12-08 19-07-53](https://f.cloud.github.com/assets/28543/1701900/b771d84c-6076-11e3-88fd-bbd493348a9b.png)