* 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

* 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

* Add files via upload

* Delete unicom_compute_pos_neg.py

* Delete unicom_split.py

* Add files via upload

* Update README.md

* Delete reader.py

* Delete run.sh

* Delete run_classifier.py

* Delete utils.py

* Add files via upload

* Update config.py

* Update run.sh

* update emotion-detection readme and fix open problem

* update downloads.py

* fix bug on ernie based inferring

* replace open with io.open to be compatible with  windows

* Rename language_representations_kit to PaddleLARK

* Update link to ernie

* Revert change in bert/train.sh

* Fix div zero error in lr decay

* Update readme

* update downloads.py

* fix bug on ernie based inferring

* Upload mode: Dialogue-BLATO.

* Update README.md.

* add windows support on language model download dataset.

* update for paddle 1.6

* update optimize op in paddle 1.6

* fix ernie based in paddle 1.6

* fix coding for windows

* emotion-detection => 1.6

* ERNIE => 1.6

* [PaddleNLP] update emotion_detection readme

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

* fix_dgu_ade_dnet

* fix_readme

* Update Transformer using Paddle-1.6 apis.

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

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

* add check for paddle version

* Remove KD scripts

* Add ERNIE2.0 service

* Update server

* Update MTL

* Update README.md

* Update README.md for MTL

* Update README.md

* upgrade_dmtk_name

cherry-pick the readme from develop

Those images are for the new readme of PaddleNLP.

* emotion-detection => 1.6

* ERNIE => 1.6

* [PaddleNLP] update emotion_detection readme

* Update README.md

* padding ernie

* modify ernie

* modify code style

* remove squeeze_labels

* fix lod/ernie input_mask dtype

* padding LAC/ERNIE revert squeeze

* padding LAC/ERNIE revert label shape

* padding LAC/ERNIE add padded_token_embeddings

* Upgrade bert to 1.6 api

* Use inplace for reshape

* Remove KD scripts

* Add ERNIE2.0 service

* Update server

* Update MTL

* Update README.md

* Update README.md for MTL

* Update README.md

cherry-pick add aistudio link in README #3568 (#3585)