readme: I've converted the DINO checkpoints from the [official repo](https://github.com/facebookresearch/dino): 
  
  You can use it as follows:
  
  ```python
  from transformers import ViTModel
  
  model = ViTModel.from_pretrained("nielsr/dino_vitb16", add_pooling_layer=False)
  
  ```