added rank

src/main/java/io/zipcoder/casino/Rank.java

+package io.zipcoder.casino;
+
+public enum Rank {
+    DEUCE(2), THREE(3), FOUR(4), FIVE(5), SIX(6), SEVEN(7), EIGHT(8), NINE(
+            9), TEN(10), JACK(10), QUEEN(10), KING(10), ACE(1);
+
+    private int point;
+
+    Rank(int points) {
+        this.point = points;
+    }
+
+    public int getPoint() {
+        return this.point;
+    }
+
+}