* Update index_cn.rst

* Update index.rst

* Update index.rst

* Update executor.rst

* Update Developer's_Guide_to_Paddle_Fluid.md

* fix conv typo

* Update index.rst

* Update lod_tensor.md

* Update index.rst

* windows doc

* fix comment. test=develop

* create how to write docs

* Update write_docs_cn.md

* Update write_docs_cn.md

* Update write_docs_cn.md

* Update fluid_design_idea.md

* Update install_Ubuntu.md

* Update install_MacOS.md

* Update install_CentOS.md

* Update install_Windows.md

* Update compile_CentOS.md

* Update compile_MacOS.md

* Update compile_Ubuntu.md

* add metrics api guide

* update metrics.rst

* update metrics.rst

* update metrics.rst

* update metrics.rst

* update metrics.rst

* update metrics.rst