Initial dev test commit
Added registration and logging in checking by using mongoose and creating a /models folder with db.js for the connection and setting up schemas, and user.js for setting up and exposing the user module and any needed functions for it. TODO: add session support; adding profiles to a user and generating an allergies list for the user.
Added sessions in memory; added user db functionality w/ creating and editing profiles, whose allergies are stored as strings for now. Want to make them references to already existing allergy objects if possible to keep count of uses; add in IP, location, Date and Time stores. Add quick add to scan page. Add home button. Implement the main functionality.