New update

* Change the Algorithm for Aces
 If we use the algorithm for day 4 which judges whether to add 11       
 by   a = 0 or a = 1, then we will have bug that 

Player 2: | Clover 9 | Spade 2 | Message: Next Card: Diamond A BUSTED
 
 Thus I changed back to the original algorithm.

* Reader-friendly version of codes

 shuffule();
 getCards();
  general things
  rule();
  condMsg(); // conditional message
 display();

 which this code is now pretty easy to modify for other games.

* playerCards is no longer an output buffer
 now available for other data usage since we are storing the raw
 hex number as in the 2D array.