Added support to build our sponsor list from the meetup API

I've added support to build our sponsor list using the Meetup API.  This is working great, two things we may want to consider:

* Using just the "die cut" style logos on meetup.  Seeing just the logo looks better on the RubyLoCo site (instead of the logo w/ the company name).
* Using a proper logo for Chase (or possibly removing him as a sponsor). It's comical to see his head on the page, but also not flattering for the site.