pt-to-tf model architecture override
This PR adds an extra arg to the `pt-to-tf` conversion script. We've seen a few uploaded models where the `config.json` doesn't specify the model class and the script autodetects the wrong one, which means some weights are not converted. This argument lets you override the autodetection and specify a model class to use for the conversion.
_The documentation is not available anymore as the PR was closed or merged._