* Remove deprecated option enable_auto_doc_ref for recommonmark
* Add first level navigation structure for Nano how-to guides
* Update navigation for How-to Training part
* Update navigation for How-to Inference part
* Update navigation for How-to Preprocessing/Install part and other small fixes
* Fix wrong link path caused by position changes of how-to install related guides
* Small fix
* update howto guide for optimizer
* update export model
* update typo
* update based on comments
* fix bug of get_best_model without validation data
* update ut
* update
* update
* fix 600s
* fix
* Add more key features regarding TorchNano and @nano for pytorch training
* Small fixes
* Remove the Overview title
* Add auto_lr in related notes
* Update based on comments
* upddate installation
* update
* update runtime acceleration
* update link in rst
* add bf16 quantization and optimize()
* update based on comment
* update
* update based on comment
* add key feature and how to guide for context manager
* update key feature for multi models
* update based on comment
* update
* update based on comments
* update
* update
* Remove manually-added bold style for titles in [User guide] section
* Fix failed relative links in windows user guide
* Remove manually-added bold style for titles in [Orca] section
* Fix failed relative links & title bold fix in Nano 5 min
* Remove manually-added bold style for titles in [Nano] section
* Remove manually-added bold style for titles in [DLlib] section
* Remove manually-added bold style for titles in [Chronos] section
* Remove manually-added bold style for titles in Developer guide
* Remove manually-added bold title style for all other not-included md files in docs/readthedocs/source/doc folder
* Fix based on comments
* refactor toc
* refactor toc
* Change to pydata-sphinx-theme and update packages requirement list for ReadtheDocs
* Remove customized css for old theme
* Add index page to each top bar section and limit dropdown maximum to be 4
* Use js to change 'More' to 'Libraries'
* Add custom.css to conf.py for further css changes
* Add BigDL logo and search bar
* refactor toc
* refactor toc and add overview
* refactor toc and add overview
* refactor toc and add overview
* refactor get started
* add paper and video section
* add videos
* add grid columns in landing page
* add document roadmap to index
* reapply search bar and github icon commit
* reorg orca and chronos sections
* Test: weaken ads by js
* update: change left attrbute
* update: add comments
* update: change opacity to 0.7
* Remove useless theme template override for old theme
* Add sidebar releases component in the home page
* Remove sidebar search and restore top nav search button
* Add BigDL handouts
* Add back to homepage button to pages except from the home page
* Update releases contents & styles in left sidebar
* Add version badge to the top bar
* Test: weaken ads by js
* update: add comments
* remove landing page contents
* rfix chronos install
* refactor install
* refactor chronos section titles
* refactor nano index
* change chronos landing
* revise chronos landing page
* add document navigator to nano landing page
* revise install landing page
* Improve css of versions in sidebar
* Make handouts image pointing to a page in new tab
* add win guide to install
* add dliib installation
* revise title bar
* rename index files
* add index page for user guide
* add dllib and orca API
* update user guide landing page
* refactor side bar
* Remove extra style configuration of card components & make different card usage consistent
* Remove extra styles for Nano how-to guides
* Remove extra styles for Chronos how-to guides
* Remove dark mode for now
* Update index page description
* Add decision tree for choosing BigDL libraries in index page
* add dllib models api, revise core layers formats
* Change primary & info color in light mode
* Restyle card components
* Restructure Chronos landing page
* Update card style
* Update BigDL library selection decision tree
* Fix failed Chronos tutorials filter
* refactor PPML documents
* refactor and add friesian documents
* add friesian arch diagram
* update landing pages and fill key features guide index page
* Restyle link card component
* Style video frames in PPML sections
* Adjust Nano landing page
* put api docs to the last in index for convinience
* Make badge horizontal padding smaller & small changes
* Change the second letter of all header titles to be small capitalizd
* Small changes on Chronos index page
* Revise decision tree to make it smaller
* Update: try to change the position of ads.
* Bugfix: deleted nonexist file config
* Update: update ad JS/CSS/config
* Update: change ad.
* Update: delete my template and change files.
* Update: change chronos installation table color.
* Update: change table font color to --pst-color-primary-text
* Remove old contents in landing page sidebar
* Restyle badge for usage in card footer again
* Add quicklinks template on landing page sidebar
* add quick links
* Add scala logo
* move tf, pytorch out of the link
* change orca key features cards
* fix typo
* fix a mistake in wording
* Restyle badge for card footer
* Update decision tree
* Remove useless html templates
* add more api docs and update tutorials in dllib
* update chronos install using new style
* merge changes in nano doc from master
* fix quickstart links in sidebar quicklinks
* Make tables responsive
* Fix overflow in api doc
* Fix list indents problems in [User guide] section
* Further fixes to nested bullets contents in [User Guide] section
* Fix strange title in Nano 5-min doc
* Fix list indent problems in [DLlib] section
* Fix misnumbered list problems and other small fixes for [Chronos] section
* Fix list indent problems and other small fixes for [Friesian] section
* Fix list indent problem and other small fixes for [PPML] section
* Fix list indent problem for developer guide
* Fix list indent problem for [Cluster Serving] section
* fix dllib links
* Fix wrong relative link in section landing page
Co-authored-by: Yuwen Hu <yuwen.hu@intel.com>
Co-authored-by: Juntao Luo <1072087358@qq.com>
* Correct typos for Nano User Guide page
* Correct typos for BigDL-Nano PyTorch Training Overview page
* Correct typos for BigDL-Nano PyTorch Inference Overview page
* Correct typos for BigDL-Nano PyTorch ONNXRuntime Acceleration Quickstart page
* Correct typos for Windows User Guide page
* Correct typos for BigDL-Nano TensorFlow Training Overview page
* Correct typos for BigDL-Nano TensorFlow Inference Overview page
* Small fix based on Shengsheng's comments
* Fix based on Wang, Yang's comments
* Add nano documentation for pytorch training quickstart
* fix some typo
* break pytorch training and inference to two files
* simplify trainer import
* fix train doc
