ADDING THE NIFTY DAL

It doesn't include the newest tables, user_info and user_notifications, but I wanted to get something in

WORKIN THE DAL
- just call the query from the class you want
     OPTIONAL: You can pass in a mysqli connection to all of the static procedures


FUTURE UPGRADES
- put together better error/success messaging
- test deletes of items with foreign keys in other tables
- add new tables