def create_from_config(config, distro, region):
pass<EOL>
Creates a new instance of the specified distro from the given
configuration.

:param dict config: An implementation-specific configuration
    dictionary. This is most likely something read in from a
    configuration language and passed directly to this layer.
:param Distribution distro: The distribution to spin the instance up
    as.
:param unicode region: The region to spin the instance up within.

:return: An :class:`ICloudInstance` provider for a newly created
    instance with type distro.