* add docs

* add Tensor concept introduction

* add Tensor concept introduction

* add Tensor concept introduction

* add Tensor concept introduction

* add Tensor concept introduction

* fix example code

* Add English doc of debugging

* Add English doc of error_handling

As the title

* update conv kl-loss doc

We added basic English usage guide. In addition, I thought some Chinese sentences are not good so I modified them.

TODO: Yamei suggested to split this file into basic usage and architecture. I will do it in next PRs

updata norm doc

* refine doc of stack

* update paddle api

* fix typo

* fix doc

* fix sample code

* fix code-block

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix python code

* fix batchnorm ,test=develop

As the title.

* add the chinese doc of binary_cross_entropy_with_logits.

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix python code

* fix norm bug cn doc, test=develop

* fix norm bug cn doc, test=develop

fix the argmax, argmin doc, change the default value for the argmax/argmin

* for new optimizer

* update en doc

* update en doc

* update en doc

* update cn doc

* fix cn doc

* update doc

* fix code style

* fix firmula of adamw

* update doc

* update doc

* fix sample code

* fix sample code

* fix rmsprop sample code

* change learningratedecay to lrscheduler

* fix doc

* fix return

* fix sample code

* fix sample code

* fix sample code

* fix sample code

* add distributed dir and doc

* remove start_processes & move DataParallel

* add get rank and world size

* add cn docs

* add index to distributed_cn

* add white list api

* add api white list

* add cn to api name

* polish details

* add rst suffix

* add py function

当前只是最基本的文档，我正在添加：

支持和不支持的语法情况
高级debug功能使用方法文档
本文档的架构也需要添加画图更加直观
对应英文文档

* update doc fix for some ops, test=develop

* udpate the doc for asin, cos, atan, test=develop

add the doc for the logic ops, add the broadcasting ops

* add functional_one_hot doc

* fix some bug

* fix some bug

* fix some bug

* fix some asc bug

* fix code bug

* fix text

* add example code

* fix bug

* fix bug

* fix bug

* fix some bug

* add InputSpec zh doc

* fix sample code

* modify declarative into to_static

* sync with 2.0 api

Add dynamic/static learning rate doc for the api2.0

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix python code

* fix norm api cn, test=develop

* fix norm api cn, test=develop

* fix norm api cn, test=develop

* fix norm api cn, test=develop

* fix norm api cn, test=develop

* fix norm api cn, test=develop

* update the demo code and the doc of varbase.backward.

* remove the dependence of  BackwardStrategy

Co-authored-by: Nwangchaochaohu <wangchao66@baidu.com>