Enhanced the score text to display score in red when negative. Used NSAttributedString
Separated the Score display into two separate labels - Title, Score and set the Title font attributes directly in the storyboard to reduce some of the code in the controller.
The Selection History view's text area's content was not starting from the top, so reset the text area's frame to start  at 0 instead of 64 and (correspondingly) adjusted height to 618
TODO: At some later point try to use Alpha attribute of the font for shading the card contents.
SetCardGameViewcontroller - Using the Alpha component of foreground color to represent the shading within a shape.
CardGameViewController - Logging of selected card index for debug purposes.