* add export model for ofa (#548)

* OFA demo for ernie (#493)

* cherry pick

* fix bug when paddle upgrade (#606)

* add jpg

* fix prune demo batchsize

* fix lr shcedule in prune demo
;

* remove softmax from demo/models
Co-authored-by: Nwanghaoshuang <wanghaoshuang@baidu.com>

* fix prune demo batchsize

* fix lr shcedule in prune demo
;
Co-authored-by: Nwanghaoshuang <wanghaoshuang@baidu.com>

* update

* fix

* quant quick_start update

* quant quick_start update

* fix when param name is not None

* fix nas (#553)

* fix when lambda_distill is None in ofa (#550)

* fix

* fix when lambda is None

* fix when the task is mnli (#540)

* fix

* fix when mnli

* Fix ofa (#536)

* fix

* fix embedding
Co-authored-by: NBai Yifan <me@ethanbai.com>
Co-authored-by: NBai Yifan <me@ethanbai.com>

* fix dygraph quant demo dataset issue

* fix dygraph quant demo dataset issue

* move imagenet.py to root of demo

* Support eval and export model in pruning demo

* fix

* fix embedding
Co-authored-by: NBai Yifan <me@ethanbai.com>

* for bert