* debug

* fix 2 -conv2d

* "锚" ==> anchor(s)

* update_install_doc

* follow_comments

* thorough clean

* delete_DS_Store

* modify doc
test=develop

* follow review

* fix typo

* follow comment

* 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

* upload /sequenceen.rst

* Review

* file path fix

* data_in_out_en

* Review

* Correct file path

* delete redundant

* programming_guide_en

* Review

Update layers_cn.rst

* upload cluster_train_data_en.rst

* Review

* polish

add explanation of auc

* control_flow_en_loss_function_en_metric_en

* Review x3

add explanation of auc

* upload memory_optimize_en.rst

* Review

* fix jargon

* Fix memory ==> video memory

* upload parallel_executor_en.rst

* Review

* Redundant