This PR updates the Python actor format to the format we agreed to in https://github.com/apify/actor-templates/pull/113, but without updating the actual actor code to use the Python SDK (since it's not released yet). That will come in another PR.
@jirimoravcik Could you please just sanity check this that there's nothing stupid here, so that I can merge it? I'd like to merge the CLI support later as well, so that we're ready for the SDK release.
This PR updates the Python actor format to the format we agreed to in https://github.com/apify/actor-templates/pull/113, but without updating the actual actor code to use the Python SDK (since it's not released yet). That will come in another PR.