Update quickstart docs with new output for describe (confluentinc#684)

Update quickstart docs with new output for describe (confluentinc#684)

Update version compatibility matrix

KSQL-473: point quickstart non-docker docs to release tarballs (confl…

…uentinc#601)

* KSQL-473: point quickstart non-docker docs to release tarballs

Point the quickstart non-docker instructions to the release tarball
on s3. Release tarballs are manually generated and uploaded to the
ksql-releases s3 bucket. This change also updates the instructions
accordingly.

Point the main readme to the release-tagged documentation.

* Move the doc links back inline

* Remove git step

The number of replicas for the command topic should be set by 'ksql.s… (

confluentinc#565)

* The number of replicas for the command topic should be set by 'ksql.sink.replicas'.

* Minor style change.

Clarify KEY property for TABLE

Ksql 415 schema registry integration (confluentinc#488)

* Fist phase of Schema Registry integration. Simple end to end avro works with schema registry.
Need to add tests.

* Adding schema inference from avro schem in schema registry.

* Minor fixes for Avro and Schema Registry support.

* Added test.

* FIxed some issues regarding SR integration and SR url setting.

* Minor changes in the code. Clean up the commented code. Use correct Schema Registry url based on the user set properties.

* Check if the avro schema for the result is valid in Schema Registry.

* Added unittest for AvroUtil.

* Fixed bugs in serde related to correct schema for avro in internal topics.
Added unit and integration tests for schema registry integration.

* Applied review feedback.

* Added review feedback.

* Applied some review feedback.

* Applied review feedback.
Use single schema registry client.
Use Avro SchemaBuilder to generate avro schema.

* More reveiew feedback.

* Updated the docs by adding Schema Registry/avro section to the Examples page.

* Added link to the avro docs.

* Applied more review feedback.

* Check for old registered topic case. We only use this in tests at the moment.

* Don't infer the schema if it is specified in the statement.

* Removed depricated avro producer/consumers.

* Doc update and case insensitive field name support for Avro.

* More update for docs.

* Updated docs for table key requirements. Improved avro deserialization test.

* Minor doc update.

* Minor doc format change.

Add ratings example to the docs (confluentinc#535)

Merge branch '0.1.x' into 4.0.x

Merge branch '0.1.x' into 4.0.x