Organize app and its resources better
Use express3-handlebars shorthand
Update `numBooks` value to `2000` so it can be formatted
Only load the `Intl` polyfill when it's needed
Improve locale content negotiation
Move page title to an i18n string and split `numBooks` number from label
Rename app.js to server.js
Updates to align with yahoo/handlebars-helper-intl#20