Assumes you have an SSH tunnel to cloudapi.blender.org with
localhost:27018 forwarded to localhost-at-other-side:27017, like:
ssh cloudapi.blender.org -L 27018:localhost:27017
WARNING: make a backup copy of your local config.py before pulling
this change, as Git will overwrite it without warning.
The configuration defaults to deployment settings, allowing overrides.
Overrides are read from config_local.py and from the file pointed to
by the PILLAR_CONFIG env var.
