Assignment 2.5: added support for feedback by building up a history of match feedback
Assignment 2.6: changed UI to hold 36 cards (6 more than in the assignment as my iPhone 5S screen is able to fit the extra row)
Assignment 2 extra credit 1: added a UISlider to go back in time and display the match history. The slider will be disabled when there is nothing to display, and enable when there is something to look back at.
Assignment 2 extra credit 2: changed the front and back of the cards
Assignment 2 extra credit 2: changed the launch images and added icons