Cameron | Created scripts to populate the db from a csv

tools/populateDbFromCsv.js: for a csv with thoughtWorker
email,firstName,lastName
tools/populateDbFromGuest.js: for a csv with guest
email,firstName,lastName

IMPORTANT: the User model has changed: it now has a firstName field, and
authentication tokens for it are now generated with email + name instead
of just email (some guests have duplicate emails)