Add DALL-E: Zero-Shot Text-to-Image Generation
# 🚀 Feature request

Please add DALLE-E model to huggingface's Transformers library.

1. [Announcement](https://openai.com/blog/dall-e/)
2. [Abstract](https://arxiv.org/abs/2102.12092v2)
3. [Paper](https://arxiv.org/pdf/2102.12092v2.pdf)
4. Code:
    - [openai/DALL-E](https://github.com/openai/DALL-E) (official)
    - [lucidrains/DALLE-pytorch](https://github.com/lucidrains/DALLE-pytorch) ([Colab](https://colab.research.google.com/drive/1dWvA54k4fH8zAmiix3VXbg95uEIMfqQM?usp=sharing))

## Motivation

> DALL·E is a 12-billion parameter version of [GPT-3](https://huggingface.co/transformers/model_doc/gpt.html) trained to generate images from text descriptions, using a dataset of text–image pairs
>
> We (Open AI) decided to name our model using a portmanteau of the artist Salvador Dalí and Pixar’s WALL·E.

This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md) are likely to be ignored.<|||||>+1<|||||>Does dall-e mini currently added to transformers?
Currently, it doesn't `eBart` is not recognized in transformers library.<|||||>cc @patil-suraj who's currently working on making it easier to use from transformers