test=develop

* add en index for install doc,fix some expressions

* Appendix title

* add learning_materials_en and update install doc to the latest

* Update learning_materials_en.md

* polish_win_install

* follow_comments

* add installTranslationEnModify for xx

* Update CentOSen.md

* Update CentOSen.md

* Update CentOSen.md

* Update FAQen.md

* Update CentOSen.md

* Update MacOSen.md

* Update CentOSen.md

* Update MacOSen.md

* Update Ubuntuen.md

* Update CentOSen.md

* Update Ubuntuen.md

* Update Windowsen.md

* Update Ubuntuen.md

* Update Ubuntuen.md

* Update Windowsen.md

* Update CentOSen.md

* review CentosCompileEn

modify existing problems

* Update compileMacOSen.md

* Update compileCentOSen.md

fix title

* Update compileMacOSen.md

fix titles

* review and update Ubuntu compile

* review Windows Compile

* review Appendix

* filename correction and some fix

* Update fromsource_en.rst

* fix_centos_gpu_docker_usage_guide

* refine language

* fix the wrong version number

* update Paddle develop commit id

* fix for python3 support
test=develop

* test=develop

* refine info of whl

* fix link for release-whls

* remove fast install info

* refine info of whl

* fix link for release-whls

* update layers_nn

* Update layers_cn.rst

* Update layers_cn.rst

* update api_cn except layers

* update fluid_cn.rst

* Update metrics_cn.rst

* update_ciwhl

* update_2nd

* fix_3rd

* fix_deadlinks (#476)

* [infer][rl_note]develop=1.2 (#480)

* update_infer_toctree

* add_fluid

* Update release_note.rst

* 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

* update_en_api

* update_again

* bug_fix

* fix_2nd

* Add avx info 1.1 (#279)

* refine avx info representation

* refine avx info representation

* refine avx info representation

* updatetoavx

* fix_AVX

* 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 install_doc for python3

* update python3.5+ info,test=develop

* fix review, test=develop

* add windows compile, install guide support

* adjust the format

* correct the format
test=develop

* fix the style
test=develop

* fix issue
test=develop

* disable the windows cpp-reference doc temporarily
test=develop

* restore the inference doc
test=develop

* Update install_Ubuntu.md

* Update install_MacOS.md

* Update install_CentOS.md

* Update install_Windows.md

* Update compile_CentOS.md

* Update compile_MacOS.md

* Update compile_Ubuntu.md