Testing

So, I was thinking about this more, and I think the only time we'd want to disable CSRF stuff is during testing anyway (since it's also key to the remember-me behavior, most notably), which means this can probably just be conditional on the TESTING config key. Note also that if we're not actually using the value, there's no point creating a random value either, so it may as well just be roughly: if testing, return some constant string, otherwise do all the processing. Possibly could even make it simpler by not changing the function at all, and just doing something like `geordi.frontend.views.get_csrf = lambda: "constant string"`, if overwriting functions works like that in python (I'm not sure).