Registering a Key with Payswarm.js

In the past two days I went through "Web Payments with PaySwarm: Identity (part 1 of 3)" on the Mozilla Hacks website. I encountered some difficulty due to an outdated version of payswarm.js and a few missing modules. The latest version of payswarm.js is available at https://github.com/digitalbazaar/payswarm.js. The modules are available at the npm website https://npmjs.org/. The ones I installed were: ursa, async, jsonld, mkdirp, pkginfo, prompt, and commander. I did this with the "npm install [module name]" command, e.g. npm install ursa. I talked on the IRC channel #payswarm and received a response from dlongley archived in this thread on the webpayments mailing list.