Consolidate slurpers into this project.

Peril is a lot more distributed that in has to be. Even though you *can* write slurpers in any language and plug them in, we only have one slurper in Python and four in Ruby.

Let's just bring everything in locally and call it directly.

- [x] hubslurp
- [x] mailslurp
- [x] rssslurp
- [x] stackslurp