* add dataset api_cn (#673)

* rm fluid.core in desigin_idea (#674)

* Update fluid_design_idea.md

* Update fluid_design_idea_en.md

* Fix array_read code example error. (#671)
Signed-off-by: Nzhaoyuchen <zhaoyuchen01@baidu.com>

* add data_reader_cn (#676)

* fix doc error (#675)

* update_book_commitid (#680)

* update_book_commitid

* commitid0309

* fix typo

* book indexes (#677)

* fix_format

* Update Tables.md

* Update Tables_en.md

* 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)

* debug

* fix 2 -conv2d

* "锚" ==> anchor(s)

* fix_windows

* Final update 1.3 (#653)

* thorough clean

* delete_DS_Store

* update_1.3

* debug

* fix 2 -conv2d

* "锚" ==> anchor(s)

* fix_deadlinks

* update_docker

* Update release_note.rst

* thorough clean

* delete_DS_Store

* update_1.3

* thorough clean

* delete_DS_Store

* [Don't merge now]update_install_doc (#643)

* update_install_doc

* follow_comments

* add maxdepth (#646)

* upload_md (#649)

* update_version (#650)

* Translation of 16 new apis (#651)

* fix_windows

* update_install_doc

* follow_comments

* thorough clean

* delete_DS_Store

* thorough clean

* delete_DS_Store

* modify doc
test=develop

* follow review

* fix typo

* follow comment

* update_commitid1.3 (#641)

* update inference c++ API doc (#634)

* update inference c++ API doc

* fix link

* update inference c++ API doc

* fix link

* learning_rate_modifier_en

* Review

* File path

* pooling_en

* Review

* File path

* detection_en

* Review

* file path

* data_feeder_en

* Review

* file path

* upload activationsen.rst

* Update activationsen.rst

* Update activationsen.rst

* Review

* file path

* upload async_trainingen.rst

* Review

* upload cpu_train_best_practiceen.rst

* Review

* upload large_scale_sparse_feature_trainingen.rst

* Review

* sparse_update_en

* Review

* file path review x2

* conv_en

* Review

* Review

* optimizer_en

* Review

* file path

* tensor_en

* Review

* file path

* executor_en

* Review

* file path+review x2

* model_save_reader_en

* Review

* delete redundant

* inference_en

* Review

* upload sync_trainingen.rst

* Update sync_trainingen.rst

* Update sync_trainingen.rst

* Review

* upload mathen.rst

* Update mathen.rst

* Review

* file path