* fix the ref for api_guides

* update_book

* fix for python3 support (#488)

* fix for python3 support
test=develop

* test=develop

* backward.rst

* Update backward.rst

* Update programming_guide.md (#493)

* update layers_nn

* Update layers_cn.rst

* Update layers_cn.rst

* update api_cn except layers

* update fluid_cn.rst

* Update metrics_cn.rst

* update_ciwhl

* update_2nd

* fix_3rd

* fix_deadlinks (#476)

* [infer][rl_note]develop=1.2 (#480)

* update_infer_toctree

* add_fluid

* Update release_note.rst

This reverts commit 69f0f35e.

* fix the dead links

* fix the dead links for programming_guide

* add developer's guide doc for release/1.0.0

* Update index.rst

* create programming_guide.md

* Update programming_guide.md

* Update programming_guide.md

* Update programming_guide.md

* Update programming_guide.md

* Update programming_guide.md