Rename from OFI to Staypuft
  - Doesn't include the rename stuff in the README.md as that is a separate change.
  - For some reason ofi.rb looks like a delete/new, but it was a `git mv`, so I don't know why.
Merge branch 'staypuft-rename' of github.com:knowncitizen/OFI into knowncitizen-staypuft-rename