Allow Bower to manage our jQuery dependency

This is removing the `lib` directory and checking in `bower_components` which should contain and any other dependency we may need latter. 

Checking in `bower_components` is useful because otherwise people would need to run `bower install` to be able to run the tests or compare. The downside is because our repo gets bigger, so let me know what you prefer.

There is a nice post about this here http://addyosmani.com/blog/checking-in-front-end-dependencies/.