Write script to generate fixture files

[miketaylr]

Ideally we could run the app in "record" mode, and all API responses it got back from GitHub it would save to the tests/fixtures folder. And then we could nuke the old fixtures from time to time and get "fresh" ones.

cf. #712.

[marimeireles]

Hm... That's what my get fixtures mode did. Isn't it?

[karlcow]

@marimeireles yes. and that was October 17, 2015. Many things happened since which is the sense of #2756 issue. Let's close this one. Thanks @miketaylr for unearthing that dinosaurs skeleton! 😆 🦎

[marimeireles]

hahaha
it's okay :p

[karlcow]

Also just for the record. There is a vcrpy module which has some of these capabilities that @miketaylr was talking about (when we were still painting on cave walls with our hands).