* update ppdet docs & remove static code, test=document_fix

* add pphuman doc, test=document_fix

* update action doc, test=document_fix

* update activity, test=document_fix

* optimize pphuman action document

* add en doc

* update attr docs

* update more

* update docs

* attribute docs update

* fix mtmct

* update docs

* add pphuman mot doc, test=document_fix

* add mot data tutorials, test=document_fix

* add docs, still in working

* add action doc

* add action en doc

* add fight recognition docs

* add fight recognition tool file : split_fight_train_test_dataset.py

* fight recognition quick start and develop documents

* add solution selection table for action recognition.

* add fight recognition case AI Studio link

* refactor doc, test=document_fix

* update yolox & yolov5, test=document_fix

* Update README_cn.md

* update doc, test=document_fix

* Update readme and pphuman readme

* Update README.md

* add data & customize, test=document_fix

* update readme

* Update README_cn.md

* Update README_cn.md

* add template, test=document_fix
Co-authored-by: NYixinKristy <576550767@qq.com>

* fix infer dataset download and label

* add doc, test=document_fix

* added OpenVINO fairmort tutorial

* added Chinese version Readme.

* removed unused code

* slove_readme_link_useless

* add docs for custom dataset, reader and model technical

* modify docs according to review, test=document_fix

* modify READER.md, test=document_fix

* Update install doc and deploy doc.

* unify log_smooth_windows and log_iter

test=develop

* remove duplicate log_iter

* remain mobile yml, since they are soft-link

test=develop

* add roadsign_voc dataset and update FAQ

* Add roadsign_voc dataset, updatea FAQ.md, and add yolov3_voc and yolov3_coco config template files.

* remove configs/templates

* convert config template file to md file, update comment

* mv config annotation file to config_annotation.

* move to docs/advanced_tutorials/config_doc

* rename

* update style

* update 2019-->2020

* update yolov3_mobilenet_v1_roadsign.md

* addd preprocess as yolov3_reader

* remove yolov3_mobilenet_v1_roadsign.md and add yolov3_mobilenet_v1.md

* fix typo

* fix voc dataset and docs

* add custom datsset demo

Update rcnn param doc

* update doc in transfer learning

* update doc

* fix some docs link error

* rename config_doc

* Add doc for RCNN config.

* fix export_model doc link error

* sort out release/0.3 docs

* add new CHANGELOG

* add yolov4 in changelog

* Update docs
* Update README.md

* optimize python path

* add serving export model
* add paddle serving client in requirement.txt
* remove redundant code with codestyle check
* fix export model doc
* fix according to professional reviews
* move paddle serving model export tutorial to the last of doc

* add config link in model zoo

* fix link error

* add anchor free