Packaging RequireJS Dependencies

RequireJS is used normally (dependencies loaded individually) in development.
Flipping the RJS_OPTIMIZATION_ENABLED bit and running r.js (before compress)
will result in all dependencies being bundled and downloaded together.

@rocha @dsjen @andy-armstrong
What makes you think one page uses it? It's loaded for every page as it is part of the base template. As the name implies, the goal is to provide a set of common libraries used across all pages. These will be cached and subsequent page loads should be slightly faster since there will be less page-specific code to load. I'd prefer to be explicit about what is in this file to make it more "glanceable" than requiring developers to parse `config.js` and follow the dependency chain.