Add AWS Kinesis Redshift sink

See also https://github.com/awslabs/amazon-kinesis-connectors
Merge branch 'feature/kinesis-redshift-storage' of https://github.com/pitchtarget/snowplow into pitchtarget-feature/kinesis-redshift-storage
Merge branch 'pitchtarget-feature/kinesis-redshift-storage' into feature/kinesis-sinks