Tip box.
Switch from swaddle to foreman in payday.sh; #468

This was the big one. The others in the Makefile (though cf. #426)
should be easy.
Upgrade Aspen to pick up the fix for #522

We had to monkey-patch Tornado templating to get it to work on Windows.
Include client secret to use the higher ratelimit.
Add pair to org look ups
GitHub client_id is required to run Gittip; #398

In marshalling a request to GitHub, we were using os.environ.get, so
that if the GITHUB_CLIENT_{ID,SECRET} keys were missing we'd have
`None`s in the params. I'm not sure what behavior that'd give us (don't
we want str there?), but in any case we want to require those keys to be
present in the environment for Gittip to function. If they're missing
it's a bug.