CSV Module now ignores BOMs

[julianxcarter]

Summary

This PR enables the CSV Module to read csvs with invisible Byte Order Marks at the beginning of a file.

New behavior

The extractor now runs as expected when csvs containing a client's data include Byte Order Marks at the beginning of the file.

Code changes

1. The parse function that's run in the CSVModule's contractor now has the bom flag set to true, causing any BOMs at the beginning of the csv to be ignored.
2. A new example-csv-bom.csv file has been added as a test fixture. It's identical to the preexisting example-csv.csv file, except it include a BOM at the beginning of the file.
3. A test case verifying that the CSV module ignores BOMs has been added to CSVModule.test.js

Testing guidance

Commit 3dd1055 adds both an example csv with a BOM as well as a unit test that attempts to parse this CSV. The bom flag has not been added in this commit though, so you should see this unit test fail as the CSVModule fails to recognize the mrn column. In commit 0e3d63a, that same unit test should pass as that commit enables the bom flag.

[dmendelowitz]

This looks good to me!