How should we add new environments?

Created by: qris

I'm deploying a project where "production" doesn't make sense as there are potentially many "production" servers and no "staging".

So I changed the keys in project_settings.py, but can't deploy because fab doesn't know anything about the new environments.

I suppose I should create a localfab.py file, or something like that, but I'm not sure. It shouldn't be necessary anyway, as all the information it requires should be in project_settings.py.