This adds the two frameworks that I manage: ButterBean and Hybrid Core.

Thanks for PR-ing! For the hybrid framework, could you please come up with a descriptive description. It should be a short one liner that will help developers to understand what's in the box. Though I'd love to have themes with superpowers :)

I thought about "Does a lot of cool sh*t", but figured that might not be appropriate. :)

I'll think on it. Maybe something along the lines of "Theme development toolbox."

@justintadlock "Theme development toolbox." is good. Please update, and I'll merge.