Python CompassApp run_from_file method supports CSV, newline JSON with batching

[robfitzgerald]

in order to run very large batches of queries, we want a method on a CompassApp which

• takes a filename and chunksize argument (with reasonable default)
• by testing the filename suffix, chooses pandas from_csv or from_json with lines=True
• chunks the input, passes it to CompassApp.run

question: is it possible to do this without 1) converting each dataframe to a python List[Dict], 2) stringifying the List?

[robfitzgerald]

The CLI has been updated with this feature and the logic of writes should have the correct append output behavior to support batching from Python.

It would seem like this should just be a simple wrapper function in Python that creates the matches, such as the pandas chunking API.

[nreinicke]

This is directly related to #209