Rely on the stdlib json module being there
Use django.shortcuts.render by default

Now that we can rely on Django 1.4, we can put this here.
auth: Actually change the correct user's name

We were allowing admins to change all display names, but not
actually setting the name on the correct user.
Clean up imports
views: Fix upgrade operations output

We only want to emit blacklist if there's no version when the
existing version was rejected.