* Add BERTweet and PhoBERT models
* Update modeling_auto.py
Re-add `bart` to LM_MAPPING
* Update tokenization_auto.py
Re-add `from .configuration_mobilebert import MobileBertConfig`
not sure why it's replaced by `from transformers.configuration_mobilebert import MobileBertConfig`
* Add BERTweet and PhoBERT to pretrained_models.rst
* Update tokenization_auto.py
Remove BertweetTokenizer and PhobertTokenizer out of tokenization_auto.py (they are currently not supported by AutoTokenizer.
* Update BertweetTokenizer - without nltk
* Update model card for BERTweet
* PhoBERT - with Auto mode - without import fastBPE
* PhoBERT - with Auto mode - without import fastBPE
* BERTweet - with Auto mode - without import fastBPE
* Add PhoBERT and BERTweet to TF modeling auto
* Improve Docstrings for PhobertTokenizer and BertweetTokenizer
* Update PhoBERT and BERTweet model cards
* Fixed a merge conflict in tokenization_auto
* Used black to reformat BERTweet- and PhoBERT-related files
* Used isort to reformat BERTweet- and PhoBERT-related files
* Reformatted BERTweet- and PhoBERT-related files based on flake8
* Updated test files
* Updated test files
* Updated tf test files
* Updated tf test files
* Updated tf test files
* Updated tf test files
* Update commits from huggingface
* Delete unnecessary files
* Add tokenizers to auto and init files
* Add test files for tokenizers
* Revised model cards
* Update save_vocabulary function in BertweetTokenizer and PhobertTokenizer and test files
* Revised test files
* Update orders of Phobert and Bertweet tokenizers in auto tokenization file
