Merge pull request PaddlePaddle#680 from Meiyim/boost-version

boost version to `0.2.0`

[fix] adamw : `exclude from weight_decay` (PaddlePaddle#614)

* [fix] adamw : `exclude from weight_decay`

* [fix] fix demo `finetune_classifier.py`

Co-authored-by: chenxuyi <[email protected]>

Patch (PaddlePaddle#499)

* upgrade to the new lac interface

* remove jieba

* + init_checkppoint for seq_cls demo

* backto jieba

update readme

remove mrc loops

Merge pull request PaddlePaddle#335 from Meiyim/dev

Dev

Merge pull request PaddlePaddle#305 from Meiyim/dev

fix script typo

Merge pull request PaddlePaddle#233 from tianxin1860/develop

Release ERNIE 2.0