* Polish executor doc

* 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
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* Update doc/fluid/user_guides/howto/training/cluster_howto_en.rst
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* Update cluster_howto_en.rst

* Update index_cn.rst (#813)

* Update cluster_howto_en.rst

* Update cluster_howto_en.rst

* Update doc/fluid/user_guides/howto/training/cluster_howto_en.rst
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* Update doc/fluid/user_guides/howto/training/cluster_howto_en.rst
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* Update cluster_howto_en.rst

* save load implement optimize

* fix.

* recheck_structure&fix_typo

* fix_structure

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* fix_deadlink

* fix deadlink

* Update single_node.rst

* Update doc/fluid/user_guides/howto/training/single_node.rst
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* Update single_node.rst

* Add compiled_program.py

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* modify user_guide_howto_training_1

* remove server after pserver

* add deploy ctr doc on baidu cloud
test=develop

* test=develop

* test=develop

* test=develop

* improve save_load_variables

* Update save_load_variables.rst

* add launch mp distributed job

* fix comment

* update by comment

* test_while_training

* Textual Review

Textual Fix

* single_node

* Textual Fix

* review on webpage

* upload train_on_baidu_cloud_en

* First round review check

* review on webpage, fix minors

* upload save_load_variables_en

* Textual Review

* upload enhowto

* upload cluster quick start en

* review commit

* recover original multi_node.rst index

* fix index of cluster_howto

* fix index

* fix bugs

* 0123-routine-docbug-fix

* Update metrics.rst

* polish

* add_api_cn (#437)

* add gpu benchmark page (#436)

* add gpu benchmark

* fix comments

* add chinese link in gen_doc.py (#439)

* modified gen_doc.py

* Update gen_doc.py

* update gen_doc.py

* Update mobile doc (#440)

* update_en_structure

* update_Paddle_commitid

* delete_DS

* update_mobile_doc

* Update book commit (#438)

* update_en_structure

* update_Paddle_commitid

* delete_DS

* update_book_commit_id

* update_api_rst

* Adjust structure of advanced usage (#442)

* adjust_structure_of_advanced_usage

* Update paddle_gpu_benchmark.md

* adjust_toctree_hidden

* fix_api_guide

* Update index.rst

* fix deadlinkes (#443)

* add_toctree (#445)

* adjust_beginners_structure (#446)

* adjust_beginners_structure

* Update index.rst

* update install_doc for python3 (#418)

* update install_doc for python3

* update python3.5+ info,test=develop

* fix review, test=develop

* fix_pic (#447)

* delete en2zn link

* update lod_tensor

* 1207

 1.english api reference links removed
2. formatted

* update transpiler

* update profilse_cn

* Update docker-image instroduce, test=develop (#459)

* fix_bug (#460)

* [cp2dev]Add avx info 1.1 (#279) (#451)

* Add avx info 1.1 (#279)

* refine avx info representation

* refine avx info representation

* refine avx info representation

* updatetoavx

* fix_AVX

* update_en_api (#461)

* update api guides for cn (#462)

* Update commit_id of Paddle (#463)

* update_en_api

* update_again

* Fix bug (#465)

* update_en_api

* update_again

* bug_fix

* fix_2nd

* add_api_cn (#437)

* add gpu benchmark page (#436)

* add gpu benchmark

* fix comments

* add chinese link in gen_doc.py (#439)

* modified gen_doc.py

* Update gen_doc.py

* update gen_doc.py

* Update mobile doc (#440)

* update_en_structure

* update_Paddle_commitid

* delete_DS

* update_mobile_doc

* Update book commit (#438)

* update_en_structure

* update_Paddle_commitid

* delete_DS

* update_book_commit_id

* update_api_rst

* Adjust structure of advanced usage (#442)

* adjust_structure_of_advanced_usage

* Update paddle_gpu_benchmark.md

* adjust_toctree_hidden

* fix_api_guide

* Update index.rst

* fix deadlinkes (#443)

* add_toctree (#445)

* adjust_beginners_structure (#446)

* adjust_beginners_structure

* Update index.rst

* update install_doc for python3 (#418)

* update install_doc for python3

* update python3.5+ info,test=develop

* fix review, test=develop

* fix_pic (#447)

* update nccl2 dist train tips

* update

* update

* update

* update

* follow comments

* update dist train doc

* update

* fix style

* update