Added DAOs, DBConnector and Updated insertion.sql

fixed the bugs with the insertion script, they work fine now.

customer: facebook, photo, current_points needs to be done up. I've
commented out their parts from the database for your benefit

deals: the rest of the tables, as an entity by itself, or have a
complicated deals object. Also made a sweeping change of all "Deals /
deals" to "Deal / deal" will reflect the same change in database and
diagrams.