Utils section is restructured.
clickhouse-copier is editted.

* 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

* Copy Yandex.Metrica introduction from main page to docs

* Yet another home page structure change, couple new blocks (CLICKHOUSE-3045)

* Update Contacts section

* CLICKHOUSE-2849: more detailed legal information

* CLICKHOUSE-2978 preparation - split by files

* More changes in Contacts block

* Tune texts on index page

* update presentations

* One more benchmark

* Add usage sections to index page, adapted from slides

* Get the roadmap started, based on slides from last ClickHouse Meetup

* CLICKHOUSE-2977: some rendering tuning

* Get rid of excessive section in the end of getting started

* Make headers linkable

* CLICKHOUSE-2981: links to editing reference - https://github.com/yandex/ClickHouse/issues/849

* CLICKHOUSE-2981: fix mobile styles in docs

* Ban crawling of duplicating docs

* Open some external links in new tab

* Ban old docs too

* Lots of trivial fixes in english docs

* Lots of trivial fixes in russian docs

* Remove getting started copies in markdown

* Add Yandex.Webmaster

* Fix some sphinx warnings

* More warnings fixed in english docs

* More sphinx warnings fixed

* Add code-block:: text

* More code-block:: text

* These headers look not that well

* Better switch between documentation languages

* merge use_case.rst into ya_metrika_task.rst

* Edit the agg_functions.rst texts

* Add lost empty lines

* Lost blank lines

* Add new logo sizes

* update presentations

* Next step in migrating to new documentation

* Fix all warnings in en reference

* Fix all warnings in ru reference

* Re-arrange existing reference

* Move operation tips to main reference

* Fix typos noticed by milovidov@

* Get rid of zookeeper.md

* Looks like duplicate of tutorial.html

* Fix some mess with html tags in tutorial

* No idea why nobody noticed this before, but it was completely not clear whet to get the data

* Match code block styling between main and tutorial pages (in favor of the latter)

* Get rid of some copypaste in tutorial

* Normalize header styles

* Move example_datasets to sphinx

* Move presentations submodule to website

* Move and update README.md

* No point in duplicating articles from habrahabr here

* Move development-related docs as is for now

* doc/reference/ -> docs/ (to match the URL on website)

* Adapt links to match the previous commit

* Adapt development docs to rst (still lacks translation and strikethrough support)

* clean on release

* blacklist presentations in gulp

* strikethrough support in sphinx

* just copy development folder for now

* fix weird introduction in style article

* Style guide translation (WIP)

* Finish style guide translation to English

* gulp clean separately

* Update year in LICENSE

* Initial CONTRIBUTING.md

* Fix remaining links to old docs in tutorial

* Some tutorial fixes

* Typo

* Another typo

* Update list of authors from yandex-team accoding to git log

* Fix diff with master

* couple fixes in en what_is_clickhouse.rst

* Try different link to blog in Russian

* Swap words

* Slightly larger line height

* CLICKHOUSE-3089: disable hyphenation in docs

* update presentations

* Fix copying of txt files

* update submodule

* CLICKHOUSE-3108: fix overflow issues in mobile version

* Less weird tutorial header in mobile version

* CLICKHOUSE-3073: skip sourcemaps by default

* CLICKHOUSE-3067: rename item in docs navigation

* fix list markup

* CLICKHOUSE-3067: some documentation style tuning

* CLICKHOUSE-3067: less laggy single page documentation

* update presentations

* YQL-3278: add some links to ClickHouse Meetup in Berlin on October 5, 2017

* Add "time series" keyword

* Switch link to next event

* Switch link to next event #2

* smaller font

* Remove Palo Alto link

* Add link to Success stories list

* better title

* Update index.html

* Update index.html

* Do not expect gulp in $PATH

* Add link to Beijing meetup

* ignore presentations

* introduce requirements.txt

* Apply hacks by bayonet@ using monkey patching

* Simplify and fix patching of "single" docs on Mac OS (it still has a bug on chunk borders though)

* remove hidden symbol

* s/2016–2017/2016–2018/g

* Add some place to put virtualenv

* mkdocs was missing from requirements.txt

* This way it hurts eyes less

* Change header layout + add flags

* yandex_fonts.css -> custom.css

* Larger docs logo

* Shorter link

* Link to home from logo

* Borrow some more styles from main page

* Tune some links

* Remove shadow

* Add header border

* Header font

* Better flag margin

* Improve single page mode

* Fix search results hover

* Fix some MarkDown errors

* Silence useless error

* Get rid of index.html's

* Enable syntax highlight

* Fix link label in ru

* More style fixes in documentation scripts

Russian comment in scrip is traslated.