HBase connector for Kafka Connect

Implement an HBase connector with source and sink tasks for the Connect framework (http://docs.confluent.io/2.0.0/connect/index.html) available in Kafka 0.9 and later.

See also: http://www.confluent.io/blog/announcing-kafka-connect-building-large-scale-low-latency-data-pipelines

An HBase source (http://docs.confluent.io/2.0.0/connect/devguide.html#task-example-source-task) could be implemented as a replication endpoint or WALObserver, publishing cluster wide change streams from the WAL to one or more topics, with configurable mapping and partitioning of table changes to topics.

An HBase sink task (http://docs.confluent.io/2.0.0/connect/devguide.html#sink-tasks) would persist, with optional transformation (JSON? Avro?, map fields to native schema?), Kafka SinkRecords into HBase tables.