Support parquet data schema

[SemanticBeeng]

So that data science applications can also benefit from schema morphisms.

Consider this in #58, please.

Resources

1. https://costimuraru.wordpress.com/2018/04/26/using-protobuf-parquet-with-aws-athena-presto-or-hive/
2. https://mapr.com/blog/evolving-parquet-self-describing-data-format-new-paradigms-consumerization-hadoop-data/
3. https://www.slideshare.net/airisdata/parquet-and-avro