* fix the word error in timeline doc, test=document_preview

* fix wrong word, test=document_preview

* add 1.5.1 inference lib download path for windows

* re-organize the doc format

fix dead chain at op_notes
fix Sharelod() to ShareLoD()

* Add best practice

* add lite

* lite clean

* update

* up

* update

* refine lite mobile doc (#962)

* update

* update

* update mobile according to paddle-mobile repo

* Update mobile_readme_en.md

* update paddle-mobile doc

* delete untracked file

* refine inference api

test=develop

* fix typo

* fix typo

* fix comments

* fix typo

* update memory_optimize.rst, test=develop

* follow comment, fix typo, test=develop

* Add fluid benchmark document

Compare some models' performance as reference for users.
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* Refine doc.
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* Refine document
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* Refine doc
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* refine inference api

test=develop

* fix typo

* fix typo

* fix comments

* TRT预测库仅支持GPU编译

DLTP-739 完善tensorRT使用文档 TRT需要GPU编译

* DLTP-965 预测模型的保存和加载文档优化

* Windows_installation_English

* DLTP-1417 受训改为训练

* modify write_docs_cn, write_docs_en, include specifications about python 2.7.15 and creating  virtual env with conda

* gitignore update

* revert .gitignore;  update write_docs

* icafe DLTP-1328, stress  exe.close()

* DLTP-1383 不可迭代更正

* DLTP-1404 修复动态图文档中每段代码的格式和大小都不一样

* DLTP-1390 Pyreader中文显示格式问题

* DLTP-1393 无效链接

* DLTP-1421 paddle.fluid.layers.reduce_max中文翻译有问题

* DyGraph 调整标签结构

* modify write_docs_cn, write_docs_en, include specifications about python 2.7.15 and creating  virtual env with conda

* gitignore update

* revert .gitignore;  update write_docs

* add python inference api doc

* new python op doc,test=develop

* fix typo, test=develop

* modified lrn formula

* modified design idea

* Update fluid_design_idea.md

* Update fluid_design_idea.md

* add contribute faq

* refine with comments

* Add lod specs

* Update op notes

* Update lod specs

* add infer shape

* fix bug

* fix example; test=develop

* fix language; test=develop

* fix format error

* fix error

* fix error

* fix typo

* Update native_infer.md

* Update paddle_tensorrt_infer_en.md

* Update paddle_tensorrt_infer_en.md

* Update doc/fluid/advanced_usage/deploy/inference/paddle_tensorrt_infer_en.md
Co-Authored-By: Nacosta123 <42226556+acosta123@users.noreply.github.com>

* Update paddle_tensorrt_infer_en.md

* Update paddle_tensorrt_infer_en.md

* hotfix deadlink (#811)

* Update native_infer_en.md (#787)

* Update install_Windows_en.md (#790)

* Update install_Windows_en.md

* Update install_Windows_en.md

* Update cluster_howto_en.rst (#791)

* Update cluster_howto_en.rst

* Update cluster_howto_en.rst

* Update doc/fluid/user_guides/howto/training/cluster_howto_en.rst
Co-Authored-By: Nacosta123 <42226556+acosta123@users.noreply.github.com>

* Update doc/fluid/user_guides/howto/training/cluster_howto_en.rst
Co-Authored-By: Nacosta123 <42226556+acosta123@users.noreply.github.com>

* Update cluster_howto_en.rst

* Update index_cn.rst (#813)

* Update native_infer_en.md

* Update native_infer_en.md