Made subdir. for small tools exercises
Add filtering small tool to connect with csv parser small tool

Small tools tips:
 - They each do one thing well
 - They deal with text
 - Reading/writing from stdin, stdout, and stderr
 - They can be chained or connected to work together.

In this example we pipe data through the filter and then into the parser
to generate a JSON file output.

'(./geo_filter_bermuda | ./geo_csv_to_json) < sample.csv > filtered_output.json'