Migrate model card from transformers-repo

Read announcement at https://discuss.huggingface.co/t/announcement-all-model-cards-will-be-migrated-to-hf-co-model-repos/2755
Original file history: https://github.com/huggingface/transformers/commits/master/model_cards/google/roberta2roberta_L-24_cnn_daily_mail/README.md

README.md

@@ -0,0 +1,75 @@
+---
+language: en
+license: apache-2.0
+datasets:
+- cnn_dailymail
+tags:
+- summarization
+---
+
+# Roberta2Roberta_L-24_cnn_daily_mail EncoderDecoder model
+
+The model was introduced in 
+[this paper](https://arxiv.org/abs/1907.12461) by Sascha Rothe, Shashi Narayan, Aliaksei Severyn and first released in [this repository](https://tfhub.dev/google/bertseq2seq/roberta24_cnndm/1). 
+
+The model is an encoder-decoder model that was initialized on the `roberta-large` checkpoints for both the encoder 
+and decoder and fine-tuned on summarization on the CNN / Dailymail dataset, which is linked above.
+
+Disclaimer: The model card has been written by the Hugging Face team.
+
+## How to use
+
+You can use this model for summarization, *e.g.*
+
+```python
+from transformers import AutoTokenizer, AutoModelForSeq2SeqLM
+
+tokenizer = AutoTokenizer.from_pretrained("google/roberta2roberta_L-24_cnn_daily_mail")
+model = AutoModelForSeq2SeqLM.from_pretrained("google/roberta2roberta_L-24_cnn_daily_mail")
+
+article = """	(The Hollywood Reporter)"The Rocky Horror Picture
+Show" is the latest musical getting the small-
+screen treatment. Fox is developing a two-hour
+remake of the 1975 cult classic to be directed,
+executive-produced and choreographed by Kenneth
+Ortega ("High School Musical"). The project,
+tentatively titled "The Rocky Horror Picture Show
+Event," is casting-contingent. The special will be
+filmed in advance and not air live, but few
+details beyond that are known. In addition to
+Ortega, Gail Berman and Lou Adler, who produced
+the original film, are also attached as executive
+producers. The special will be produced by Fox 21
+Television Studios, and Berman's The Jackal Group.
+The special is timed to celebrate the 40th
+anniversary of the film, which has grossed more
+than $112 million and still plays in theaters
+across the country. TV premiere dates: The
+complete guide . This isn't the first stab at
+adapting "The Rocky Horror Picture Show." In 2002,
+Fox unveiled plans for an adaptation timed to the
+30th anniversary that never came to fruition. The
+faces of pilot season 2015 . Fox's "Glee" covered
+several of the show's most popular songs for a
+Season 2 episode and even released a special "The
+Rocky Horror Glee Show" EP. There is no plan yet
+for when the adaptation will air. Fox also has a
+live musical production of "Grease", starring
+Julianne Hough and Vanessa Hudgens, scheduled to
+air on Jan. 31, 2016. Broadcast TV scorecard .
+Following in the footsteps of "The Sound of Music"
+and "Peter Pan," NBC recently announced plans to
+air a live version of The Wiz later this year.
+Ortega's credits include "Gilmore Girls," "This Is
+It" and "Hocus Pocus." He is repped by Paradigm
+and Hanson, Jacobson. ©2015 The Hollywood
+Reporter. All rights reserved."""
+
+input_ids = tokenizer(article, return_tensors="pt").input_ids
+output_ids = model.generate(input_ids)[0]
+print(tokenizer.decode(output_ids, skip_special_tokens=True))
+# should output
+# Fox is developing a two-hour remake of the 1975 cult classic. The special will be directed, executive-produced and choreographed by Kenneth Ortega. 
+# The special is timed to celebrate the 40th anniversary of the film, which has grossed more than $112 million.
+
+```