* add reader cost, and change speed to ips; test=develop

* fix inf bug; test=develop

* fix ptb_dy time print for benchmark, test=develop

* add ips print for language_model, test=develop

* add tokens/sec; test=develop

* change np.array to np.asarray to avoid data copy; test=develop

* fix ptb_dy time print for benchmark, test=develop

* use pre-commit formate code

* fix language_model timecost algorithm

* fix dataloader time calc, test=develop

Added missing vars

Author:    Jacek Czaja <jacek.czaja@intel.com>

* update api to 1.8 for transformer and similarity_net, test=develop

* update readme, test=develop

* update lac and seq2seq to api_1.8

* update lac and seq2seq to api_1.8

* update lac and seq2seq to api_1.8

* upgrade_dialogue_models

* fix_upgrade_models_comments

* fix models because the gradient clip strategy has been upgraded,test=develop

* fix models because the gradient clip strategy has been upgraded,test=develop

* delete contrib Research and legacy

* add acl2019-arnor

* add readme.md for PaddleKG

* update CoKE

2. Fix the leaving gen_data.sh in dygraph Transformer.

* Update README.md (#4267)

* test=develop (#4269)

* 3d use new api (#4275)

* PointNet++ and PointRCNN use new API

* Update Readme of Dygraph BERT (#4277)

Fix some typos.

* Update run_classifier_multi_gpu.sh (#4279)

remove the CUDA_VISIBLE_DEVICES

* Update README.md (#4280)

* add similarity_net dygraph

* fix similarity_net dygraph

* fix bugs of dygraph/similarity_net

* Fix some bugs running on the GPU of dygraph/similarity_net

* fix a bug in pointwise mode of dygraph/similarity_net

* fix a bug of paddleNLP/similarity_net

* fix a bug and remove unuse files of dygraph/similarity_net
Co-authored-by: Npkpk <xiyzhouang@gmail.com>
Co-authored-by: NKaipeng Deng <dengkaipeng@baidu.com>

* Update README.md (#4267)

* test=develop (#4269)

* 3d use new api (#4275)

* PointNet++ and PointRCNN use new API

* Update Readme of Dygraph BERT (#4277)

Fix some typos.

* Update run_classifier_multi_gpu.sh (#4279)

remove the CUDA_VISIBLE_DEVICES

* Update README.md (#4280)

* 17 update api (#4294)

* update1.7 save/load & fluid.data

* update datafeed to dataloader

* Update resnet_acnet.py (#4297)

Bias attr of square conv should be "False" rather than None during training mode.

* test=develop

* test=develop

* test=develop

* test=develop

* test
Co-authored-by: NKaipeng Deng <dengkaipeng@baidu.com>
Co-authored-by: Nzhang wenhui <frankwhzhang@126.com>
Co-authored-by: Nparap1uie-s <parap1uie-s@users.noreply.github.com>

* update save/load for v1.7

* update load api

* update load api

* Update PaddleMT/transformer to use new while_loop API.

* Updata PaddleMT/transformer to new save/load API.

* Change d_key to d_value in cached keys.

* Update PaddleMT/transformer inference_model to use new load API.

* Make Transformer support to load py2 saved models.