Update README.md

README.md

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+Can you beat the dealer at 21
+======================================
 
+#### Model the game
+* create a single deck of playing cards
+* two players (called Sam and the Dealer) who will play against each other
+* each player is given two cards from the top of a shuffled deck of cards
+
+#### Rules to implement
+* determine score of a hand[1]
+* check if either player has blackjack (21) with their initial hand and wins the game
+* if neither player has blackjack then Sam can start drawing cards from the top of the deck
+* Sam should stop drawing cards from the deck if their total reaches 17 or higher
+* Sam has lost the game if their total is higher than 21 
+* when Sam has stopped drawing cards the Dealer can start drawing cards from the top of the deck
+* the Dealer should stop drawing cards when their total is higher than Sam.
+* the Dealer has lost the game if their total is higher than 21 
+* determine which player wins the game
+
+[1] Numbered cards are their point value. Jack, Queen and King count as 10 and Ace counts as 11.