GitLab

* add FLAML for HPO in DOC

* add FLAML for HPO

* revise FLAML phasing

* Update docs/Parameters-Tuning.rst
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update README.md
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [docs] Add details to docs on improving training speed

* formatting

* fix link

* fix formatting

* replace 'performance' with 'accuracy' and mention learning_rate

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* regenerate docs from config.h
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Path smoothing

* Try to fix issue with gpu version.

* Fix failing CI for R package.

* Minor fixes.

* Minor refactor.

* Restore old code to get CI working.

* Fix style issues.

* Fix ci for R package.

* Minor fixes for docs and code style.

* Update docs.

Add Optuna link for automated hyperparameter tuning.

* Add extra-trees functionality.

* Remove unnecessary code.

* Update docs.

* Use template for FindBestThresholdSequence.

* Use separate random seed. Fix bug.

* A nitpicky grammer edit with minor clarifications added.

* fix link

* strike s

* try a different optimal-split link, clarify experimental details

* smoothing the FAQ

* edit Features.rst

* several minor edits throughout docs

* historgram-based

The document says `num_leaves` should be smaller than `2^(max_depth)`.
But, its example says `70` or `80` may get better in case of `max_depth=6`.
2^6 is 64. 70 and 80 are greater than 64. The example doesn't make sense.

Changed `max_depth` from 6 to 7.

* delegated not showing hidden items to the rtd_theme

* refactored docs

* fixed typos and hotfixes

* converted gcc-tips.Rmd; added ref to gcc-tips

* renamed files

* renamed Advanced-Topics

* renamed README

* renamed Parameters-Tuning

* renamed FAQ

* fixed refs to FAQ

* fixed undecodable source characters

* renamed Features

* renamed Quick-Start

* fixed undecodable source characters in Features

* renamed Python-Intro

* renamed GPU-Tutorial

* renamed GPU-Windows

* fixed markdown

* fixed undecodable source characters in GPU-Windows

* renamed Parameters

* fixed markdown

* removed recommonmark dependence

* hotfixes

* added anchors to links

* fixed 404

* fixed typos

* added more anchors

* removed sphinxcontrib-napoleon dependence

* removed outdated line in Travis config

* fixed max-width of the ReadTheDocs theme

* added horizontal align to images