I added a `defaults` block that sets all of the common RequireJS options. Does that work, or do you still think that the options block should move?

I would rather not move the options from server.js because:

1) I don't expect people to override RequireJS settings in local.json
2) I can't take advantage of the `server.js`-relative paths (`WWW_ROOT`, `__dirname`)
3) To the greatest extend possible, I prefer middleware configuration to be located where the middleware is initialized. `server.js` does have a ton of code inside of it that should be refactored into other files but that's mostly because of publish, not middleware.