CSV and JSON reader

[domoritz]

Support reading CSV files into a table. We currently only support IPC.

[TheNeuralBit]

Does arrow rust have a CSV and/or JSON reader? I only see parquet

[domoritz]

Yes, they do: https://docs.rs/arrow/3.0.0/arrow/csv/reader/struct.Reader.html and https://docs.rs/arrow/3.0.0/arrow/json/reader/struct.Reader.html.