* Update programming_guide.md (#664)

* Update programming_guide.md

* Update programming_guide_en.md

* Update cn api to 1.3 (#663)

* Update cn api to 1.3 fluid & layers

* Rest to 1.3

* Weeklyupdate 0301 (#666)

* Tables_rm_op

* update_op

* update_index

* update_book_0302 (#667)

* fix_deadlinks

* update_docker

* Update release_note.rst

1. add index for all English version of "进阶使用"
2. replace legacy softlinks to howto/optimization & dev/new_op_en with original file

* upload op_notesen

* Review

* review2

* upload new_op_en.md

* Review

* Review2

* 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)

* adjust_structure_of_advanced_usage

* Update paddle_gpu_benchmark.md