Creates random_card/suit methods, deal_card method

 - deal_card method uses random_card and random_suit methods
   to deal a card with a suit
 - uses random_number(card_or_suit), that takes in the array of
   card numbers or array of suits
 - takes the length of these arrays to determine what range of
   index to return for the random number
 - uses random number as index to pull the actual card number or suit