Remove third-party vendor code

This adds [Bower](http://bower.io) support so that we don't need the third-party libraries in our repository.

Thoughts:
* Component
  * Would like to use [Component](http://component.io), but need [component support in Isotope first](https://github.com/desandro/isotope/pull/269) - Would allow use of CommonJS syntax too.
* `scripts`
  * Would like to stick the `scripts` in `templateData.site.scripts` block so that we don't need to hard-code them in the *index.html.eco* template itself
* Grunt
  * GruntJS is the next step after this, so that all JavaScript is minified and compress