* update presentations
* CLICKHOUSE-2936: redirect from clickhouse.yandex.ru and clickhouse.yandex.com
* update submodule
* lost files
* CLICKHOUSE-2981: prefer sphinx docs over original reference
* CLICKHOUSE-2981: docs styles more similar to main website + add flags to switch language links
* update presentations
* Less confusing directory structure (docs -> doc/reference/)
* Minify sphinx docs too
* Website release script: fail fast + pass docker hash on deploy
* Do not underline links in docs
* shorter
* cleanup docker images
* tune nginx config
* CLICKHOUSE-3043: get rid of habrastorage links
* Lost translation
* CLICKHOUSE-2936: temporary client-side redirect
* behaves weird in test
* put redirect back
* CLICKHOUSE-3047: copy docs txts to public too
* move to proper file
* remove old pages to avoid confusion
* Remove reference redirect warning for now
* Refresh README.md
* Yellow buttons in docs
* Use svg flags instead of unicode ones in docs
* fix test website instance
* Put flags to separate files
* wrong flag
