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

use io.open instead open in rcnn/yolo/ssd

* fix the labelme2coco.py

* fix the labelme2coco.py

* add more entries to the README.md and simplifiy them; add README for DeepVoice3 in PaddleSpeech

* add a session for model in  dygraph mode, but no more details are provided now.

* update README for dygraph

* update README for PaddleNLP and fix anchor for hyperlink

* fix anchor for hyperlink

* fix typos

* Update PaddleDetection README
* Fix some link

* Rename language_representations_kit to PaddleLARK

* Update link to ernie

* Revert change in bert/train.sh

* Update PaddleDetection/README_cn.md
* Follow comments
* Small update

* Add inference benchmark
* Adjustment order
* Update some descriptions

* [metric learning] fix windows download dataset

* add windows support on language model download dataset.

* add windows support on language model download dataset.

* fix

* ini commit for deepvoice, add tensorboard to requirements

* fix urls for code we adapted from

* fix makedirs for python2, fix README

* fix open with encoding for python2 compatability

* fix python2's str(), use encode for unicode, and str() for int

* fix python2 encoding issue, add model architecture and project structure for README

* add model structure, add explanation for hyperparameter priority order.

* fix repitiio n in README_cn, and reorder that in README

* README update; fix integer division issues for python2 compatability

* fix data type for input data, specifier the int type as np.int64 to be platform agnostic

* fix README for preprocess.py, use io.open instead of open for python2 compatability.

* update commanline options, use new save/load API

* fix IO conflict bug for data parallel training

* only construct summary writer in process 0 to further avoid conflict

* fix typos and update details for checkpoints

* fix_infer_bug_release_some_model

* ini commit for deepvoice, add tensorboard to requirements

* fix urls for code we adapted from

* fix makedirs for python2, fix README

* fix open with encoding for python2 compatability

* fix python2's str(), use encode for unicode, and str() for int

* fix python2 encoding issue, add model architecture and project structure for README

* add model structure, add explanation for hyperparameter priority order.

* fix repitiio n in README_cn, and reorder that in README

* README update; fix integer division issues for python2 compatability

* fix data type for input data, specifier the int type as np.int64 to be platform agnostic

* fix README for preprocess.py, use io.open instead of open for python2 compatability.

* update commanline options, use new save/load API

* fix IO conflict bug for data parallel training

* only construct summary writer in process 0 to further avoid conflict

* remove actual_shape

* add fpn fix