* Refine the Chinese documentation of DynamicRNN.
test=develop
test=document_preview

* Refine the memory interface of DynamicRNN.
test=develop
test=document_preview

* Refine update_memory and output of DynamicRNN.
test=develop
test=document_preview

* Update the format of note and fix a error in example.
test=document_preview

* Add name and correct some examples.

* Refine the documentation according to the review comments.

* Add function list and the doc of function __call__.

* Add optional for x in step_input.
test=develop

* Update sub-titles.

* Change fluid.layers.data in examples to fluid.data.

* Add examples for step and static input.
test=develop

* Refine some sentences.
test=develop

* Add description of shape and data type for input and output variables.
test=develop

* fix apis, test=document_preview

* fix apis, test=document_preview

* fix apis, test=document_preview

* fix apis, test=document_preview

test=develop

new document to upload in this PR

the previous doc talks about how to run CTR training on Baidu Cloud K8S Cluster.

the new doc are modified in following points.

1.Run CTR Training on Baidu Cloud K8S + Huawei Volcano
2.Auto Split CTR model into sparse ones and dense ones.
3.Cube auto fetch Sparse model, Serving auto fetch dense model.
4.provide paddle serving client to test the ctr prediction.

* fix sequence_enumerate cn doc

* only surpport LoDTensor

* add input output shape

* test=document_fix

* fix space_to_depth cn doc

* change name's text

* add input output shape

* add code example

* test=document_fix

* revision

* change name's text

* add input output shape

* test=document_fix

* update piecewise decay, test=develop

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update exponential decay, test=develop

* update,test=develop

* update, test=develop

* update, test=develop

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* set inverse time decay file to original, test=document_fix

* set piecewise decay to original, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update inverseTimeDecay, test=develop

* update, test=document_fix

* update inverse, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update polynomialDecay, test=develop

* update, test=develop

* update, test=document_fix

* update poly, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=develop

* update natural exponential decay, test=develop

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update noam, test=document_fix

* update, test=develop

* udate, test=document_fix

* noam, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update smooth, test=document_fix

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* fix example code format, test=document_fix

* update gru, test=document_fix

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, refer to the corresponding static graph api, test=document_fix

* update conv3d, test=document_fix

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* reference to the corresponding static graph api, test=document_fix

* update use_cudnn, test=document_fix

* update, test=document_fix

* update bilinear, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=ducument_fix

* update, test=document_fix

* update name description, test=document_fix

* update Conv3DTranspose, test=document_fix

* update,test=document_fix

* update, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* refer to the corresponding static graph api, test=document_fix

* update, test=document_fix

* update use_cudnn, test=document_fix

* fix APIs, test=document_preview

* fix APIs, test=document_preview

* update Tables.md compile_Ubuntu.md, test=develop

* udpate Tables.md, test=develop

* fix sequence_pad cn doc

* add input output shape

* fix length info

* fix length info and pad_value info

* test=document_fix

* revision sequence_expand cn doc

* only surpport LoDTensor

* change name's text

* add input output shape

* add code example

* add code example

* test=document_fix

* fix sequence_expand_as cn doc

* only surpport LoDTensor

* add input output shape

* add code example

* add code example

* test=document_fix

change the output of retinanet_target_assign in api_cn

* fix apis, test=develop

* drop WeightedAverage_cn.rst, test=develop

* update layer api, test=develop

* fix dtype, test=develop

* polish en doc of data_loader

* follow comments

* use fluid.data()

* update cosine decay, test=develop

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update, test=document_fix

* update cn doc for create_py_reader_by_data

* refine decription and sample code for create_py_reader_by_data

* replace fluid.layers.data with fluid.data in the sample code of cn doc of create_py_reader_by_data op

* refine the description of capacity of create_py_reader_by_data

* fix description for create_global_var,create_parameter test=develop test=document_fix