* Update 3rdparty

* Remove submodule

* Add anakin doc

* Add anakin dev docs

* Add mobile doc

* Follow comments

* Remove mobile

* Polish mobile doc

* first draft(part)

* Update index.rst

* Delete build_from_source_cn.rst

* Delete docker_install_cn.rst

* Delete index.rst

* Delete pip_install_cn.rst

* Delete foo.rst

* Delete foo.rst

* Delete overview.rst

* Delete paddleci.png

* Create foo.rst

* add install_doc

* Delete foo.rst

* delete surplus lines

* fix pip install system type and typo

* add windows package download address

* add .zip and fix path of paddle_build.sh

* fix paddle_build.sh

* Update install_doc.rst

* fix ref links

* Update install_doc.rst

Add new book's content to basics; fix the index files in basics, quick_start, and beginners' guides