$ is not defined when using jQuery via Browserify

@bcoe I'm trying use npm-typeahead with a browserify-required version of jQuery, but I think there's a problem with the load order.

I made a little debugging sample at https://github.com/zeke/npm-typeahead-example#readme

The real context is https://github.com/npm/newww/blob/makeover/assets/js/index.js

If this is hard to solve, we can just continue to bundle it as a standalone file.

cc @rockbot

Start by reproducing the `$ is not defined` failure using the debugging sample linked in the issue, then compare its setup with newww's assets/js/index.js. Trace the jQuery and npm-typeahead load order and verify that the browserified integration loads without the error; the standalone bundle is identified as the fallback.

Written by the indexing model from the issue text.