added Deck into the Dealer function
changed to capitals in Card.js. fixing Dealer.js. Added functionaly in Dealer_Unit.html
changed the return statement so that it returns an instantiation of itself
added testing for shouldHit and Bust methods
got rid of a small error where total() was using this.hand as an input
added a section to the total method that checks whether the card is an Ace, and determines whether it should be 11 or 1