Repo organization

Hey @peduarte. I've made some changes to the repo organization structure:

1. CSS and JS used by the site is now in the `site/` directory.
2. Path for `sass.sh` has been updated to relect that change
3. A `dist/` folder has been created for the distribution JS and CSS files. This is used by Bower.
4. I've added a README with some of the content from the site.