Add notes: Kafka: The definitive guide

- Chapter 9: Building Data Pipelines

KafkaTheDefinitiveGuide/Chapter9/README.md

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+# CHAPTER 9: Building Data Pipelines
+
+The main value Kafka provides to data pipelines is its ability to serve as a very large, reliable buffer between various
+stages in the pipeline.
+
+## Run Kafka Connect
+
+`bin/connect-distributed.sh config/connect-distributed.properties`
+
+The [Debezium Project](https://debezium.io/) provides a collection of high-quality, open source, change capture
+connectors for a variety of databases.
+
+Kafka can be looked at as a platform that can handle data integration (with Connect), application integration (with
+producers and consumers), and stream processing. Kafka could be a viable replacement for an ETL tool that only
+integrates data stores.