Working example with input and output for Yassi

[acfogarty]

Make a main.py so that Yassi can test his interface

For the moment, we hardcode the output in main.py instead of connecting to the real code.

python main.py --meal-weight 3000 --delta-auth 0.1 --csv-file-path here.csv --request-id 3243254749865

#output is in the file output/<request-id>_results.json

[acfogarty]

Partially fixed by commit 24053d8

Now we just need to add an example of the balance_adjuster to https://github.com/dataforgoodfr/batch5_phenix_happymeal/blob/master/main.py