* sync 1.6

* sync 1.6

* update readme

* add log out for tall reader

* fix log info of tall reader

* update PaddleNLP  lexical_analysis for Release/1.6 (#3664)

* update for paddle 1.6

* update optimize op in paddle 1.6

* fix ernie based in paddle 1.6

* fix coding for windows

* update downloads.py (#3672)

* Fix infer bug on Release/1.6  

* fix bug on ernie based inferring

* replace open with io.open to be compatible with windows (#3707)

* update README.md

* update PaddleNLP emotion_detection and ernie for Release/1.6 (#3608)

* emotion-detection => 1.6

* ERNIE => 1.6

* [PaddleNLP] update emotion_detection readme

* [PaddleNLP] emotion_detection add download.py (#3649)

* emotion-detection => 1.6

* ERNIE => 1.6

* [PaddleNLP] update emotion_detection readme

* [PaddleNLP] emotion_detection add download.py for windows user

* [PaddleNLP] fix emotion_detection open problem, add paddlehub version (#3706)

* update emotion-detection readme and fix open problem

* fix ernie

* update DeepASR API and README

* update readme

* update README

* update simnet

fix typos in PaddleNLP/README.md

* fix fruit dataset

* fix md5

* update .run_ce.sh

* chmod +x .run_ce.sh

* add ce

* add ce

* add ce

* add ce

dv3: add trained model link for downloading

* move release 1.6 code to dev for tagging

* syn merged pr

* change voc_loader

* add x2coco.py

* Update DATA.md

* Update DATA_cn.md

* Update Transformer using Paddle-1.6 apis. (#3614)

* Update Transformer using Paddle-1.6 apis.

* Add check_version for Paddle-1.6 and reorganize utils including check, configuration, etc.

* mv neural_machine_translation to  PaddleMT (#3732)

* Paddle1.6 transformer fix (#3755)

* Revert "mv neural_machine_translation to  PaddleMT (#3732)"

This reverts commit a46365b6.

* Delete Transformer unremoved palm dir.

* Rename neural_machine_translation as PaddleMT.

* Update to PaddleMT in README.md

* 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)

fix typos for paddle dialogue, and reserve a link for PaddleMT

* Use new save/load api and change fluid.layers.data to fluid.data (#3547)

* Use new save/load api and change fluid.layers.data to fluid.data

* add check for paddle version

* Use new save/load api in ptb_lm (#3546)

* Use new save/load api in ptb_lm

* add check for paddle version

* unify reader to dataloader (#3488)

unify reader to dataloader

* Use new save/load api and change fluid.layers.data to fluid.data (#3547)

* Use new save/load api and change fluid.layers.data to fluid.data

* add check for paddle version

add link for TALL into develop, fix link for PaddleLARK in README.md

* add reciprocal links for both READMEs

* add export_model doc

* add CACascadeRCNN doc
* add pretrain model download link