* 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>

* add new seq2seq example: rnn_search (#3574)

* re-commit seq2eq example: rnn search

* add new_seq2seq examples: rnn_search and vae_text

* modify dataset description in vae_text/README.md

* modify vae_text/README.md and vae_text/download.py

* update vae_text/infer.sh and vae_text/README.md

* add multi-gpu support for rnn_search; fix windows support for rnn_search and vae_text

* remove parallel argument in args.py

* remove hard codes

* remove hard codes

* update download.py for windows download

* fix model path for windows in vae_text/infer.py

* fix python2 utf-encoding

* fix utf-8 error in python2 when predict (#3721)

* change rnn_search to seq2seq; change vae_text to variational seq2seq (#3734)

* re-commit seq2eq example: rnn search

* add new_seq2seq examples: rnn_search and vae_text

* modify dataset description in vae_text/README.md

* modify vae_text/README.md and vae_text/download.py

* update vae_text/infer.sh and vae_text/README.md

* add multi-gpu support for rnn_search; fix windows support for rnn_search and vae_text

* remove parallel argument in args.py

* remove hard codes

* remove hard codes

* update download.py for windows download

* fix model path for windows in vae_text/infer.py

* fix python2 utf-encoding

* change rnn_search to seq2seq; change vae_text to variational seq2seq

* change rnn_search to seq2seq; change vae_text to variational seq2seq

* mv variational seq2seq to variational_seq2seq

* remove old projects (#3736)

* fix use_gpu=False error (#3775)

* update_seq2seq_readme (#3783)