* Remove "overview". That is already covered in the index page.
* Write a basic getting started page.
* Fix the CLI startup instructions.
Original commit: elastic/x-pack-elasticsearch@dabe72b5cc
The keywords inside SqlBase are now sorted alphabetically - much easier
to read and update the docs
Original commit: elastic/x-pack-elasticsearch@5aa89c5950
Adds docs for the REST API, translate API, the CLI, and JDBC.
Next we need to add more example queries and documentation for our
extensions.
Original commit: elastic/x-pack-elasticsearch@ed6d1360d2