TAJO-714: Enable setting Parquet tuning parameters. (David Chen via hyunsik)
TAJO-709: Add .reviewboardrc and use rbt instead of post-review. (David Chen via hyunsik)
TAJO-735: Remove multiple SLF4J bindings message. (hyoungjunkim via hyunsik)
TAJO-711: Add boilerplate Avro appender and scanner.
TAJO-711: Add Avro storage type to tests. Add boilerplate code to AvroAppender and AvroScanner.
TAJO-711: Add package-info.java and start fleshing out AvroAppender.
TAJO-711: Flesh out AvroAppender and add AvroUtils.
TAJO-711: Fix compile-time errors.