ConViT: documentation and model

[prigoyal]

We landed the Convit code and want to accomplish the next few steps:

• [x] Documentation
  • [x] documentation in docs/source/ssl_approaches @growlix
  • [x] optional: add doc to projects/ folder @growlix
• [ ] Model zoo
  • [ ] a script to train and evaluate @growlix
  • [ ] train a model and evaluate @vedanuj
  • [ ] Add the model to AWS and to the model zoo (@prigoyal can help coordinate this)

[prigoyal]

going to close this. documentation is in and we will aim to rather push the moco-v3 implementation.

[iseessel]

ConViT released in latest release: https://github.com/facebookresearch/vissl/releases/tag/v0.1.6.

Documentation is here: https://vissl.readthedocs.io/en/v0.1.6/ssl_approaches/vision_transformers.html?highlight=convit#convit