test=develop test=document_fix

* update layer_norm_cn.rst, test=develop

* update code for layer_norm_cn.rst, test=develop

* update LayerNorm_cn.rst layer_norm_cn.rst, test=develop

* update BatchNorm_cn.rst, GroupNorm_cn.rst, SpectralNorm_cn.rst, test=develop

* fix bug for GroupNorm, test=develop

* fix norm op, test=develop

* add comment, test=develop

* add comment for dygraph layer, test=develop

* add comment for dygraph layer, test=develop

* add comment for dygraph layer, test=develop

* add comment for name, test=develop

* fixed one error of api_cn

* fixed some errors of api_cn

* fixed some errors of api_cn

* fixed two errors.

* fixed two errors

* fixed one error.

* fixed one error

* fixed one error.

* fixed two errors.

* fixed one error.

* fixed two errors

* fixed two links

* synchronize api_cn with the api_en of develop.

* updated develop/api_cn

* update the api_cn of develop

* update api_cn of develop

* fixed some errors

* Delete .DS_Store

* Delete .DS_Store

* Delete .DS_Store

* Delete .DS_Store

* Delete .DS_Store

* fixed some wrong links

* fixed two links

* fixed two links and some error.

* fixed some errors.

* fixed two links