Added support to build our sponsor list from 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.
Merge pull request #1 from rubyloco/sponsors_from_meetup

Added support to build our sponsor list from the meetup API