Bower

This pull does 2 things

1. Adds a bower json
2. Adds the .use method to the server side code for consistency

The contents of the bower.json are probably a bit contentious. I've deliberately written it so the module is usable with browserify + debowerify (the superagent build constructed by components is incompatible with browserify). Preferable would be to have a built superagent which is compatible with debowerify and can be included as a standalone file, and then reference this from the bower.json main property.

Before hacking away at your build process I thought I'd ask whether such a change would likely get accepted?