containerify models

[mschrimpf]

Brain-Score now allows the submission of zip files and runs them in their own conda environment. We are starting to run into version mismatches between the many different models in candidate_models (e.g. 8885cd4) so should start to tease these apart.

Especially together with brain-score/vision#231, each model family can be its own submission that Brain-Score then provides for download without version conflicts.