It's a simple app to demonstrate how Clojure can be ran on AWS Data Pipeline.
You can run it locally with lein run, ensuring that INPUT1_STAGING_DIR
environment variable points to a folder containing animals.txt with some
animal names in separate lines, and OUTPUT1_STAGING_DIR points to a writable
directory.
To run it on Data Pipeline, use an AMI of a machine with Java and Leiningen installed.