Added tutorial doc on how to add a Space to Arxiv (#530)
* arxiv blog post
* blog post
* finish tutorial
* tweak
* Apply suggestions from code review
Co-authored-by: Julien Chaumond <julien@huggingface.co>
* rename
* add references to datasets
Co-authored-by: Julien Chaumond <julien@huggingface.co>
* rename
* rename
* added links
* wording tweaks
Co-authored-by: Julien Chaumond <julien@huggingface.co>
