* update initial build command

* add some details for building

* fix spelling check errors

* fix spelling check warnings
Signed-off-by: Nfrank chen <frank.chen021@outlook.com>

* fix broken links

* missing /

* adjustment

* De-incubation cleanup in code, docs, packaging

* remove unused docs script

* Docusaurus build framework + ingestion doc refresh.

* stick to npm instead of yarn

* fix typos

* restore some _bin

* Adjustments.

* detect and fix redirect anchors

* update anchor lint

* Web-console: remove specific column filters (#8343)

* add clear filter

* update tool kit

* remove usless check

* auto run

* add %

* Fix resource leak (#8337)

* Fix resource leak

* Patch comments

* Enable Spotbugs NP_NONNULL_RETURN_VIOLATION (#8234)

* Fixes from PR review.

* Fix more anchors.

* Preamble nix.

* Fix more anchors, headers

* clean up placeholder page

* add to website lint to travis config

* better broken link checking

* travis fix

* Fixed more broken links

* better redirects

* unfancy catch

* fix LGTM error

* link fixes

* fix md issues

* Addl fixes

* use relative link to build instructions from top level readme

* add textfile to readme

* formatting

* make README.BINARY plaintext, move LABELS.md to LABELS, README.txt to README

* exclude README.BINARY still

* remove jdk links/recommmendations

* add script to use DRUIDVERSION in textfile README instead of latest, add links to recommended jdk to build.md

* license

* better readme template, links to latest if does not detect an apache release version

* fix

* added titles and harmonized docs

* manually fixed some titles

* add missing license headers, in particular to MD files; clean up RAT exclusions

* revert inadvertent doc changes

* docs

* cr changes

* fix modified druid-production.svg

* Fix conflicts

* Modify io.druid into org.apache.druid

* Rename io.druid to org.apache.druid.

* Fix META-INF files and remove some benchmark results.

* MonitorsConfig update for metrics package migration.

* Reorder some dimensions in inner queries for some reason.

* Fix protobuf tests.

See issue #6030

1) Remove maven client from downloading extensions at runtime.
2) Provide a way to load Druid extensions and hadoop dependencies through file system.
3) Refactor pull-deps so that it can download extensions into extension directories.
4) Add documents on how to use this new extension loading mechanism.
5) Change the way how Druid tarball is generated. Now all the extensions + hadoop-client 2.3.0
are packaged within the Druid tarball.

* remove redundant parts in file names
* delete unsupported "Druid-Personal-Demo-Cluster"

so that they are editable on case-insensitive os as well