Update README to add how to use revision

Update README to add revision

Update README to fix yaml meta data

Upload new model with the latest data on Aug20, 2021

Automatic correction of README.md metadata. Contact website@huggingface.co for any question

Add Disclaimer and CHANGELOG.md

Update a link to source code

Modify model config file to set default generation parameters of top_k, top_p and do_sample

Add models and model card