efficiency improvements. added docs.

src/tests/hand_test.rs

@@ -17,7 +17,7 @@ mod tests {
     }
 
     #[test]
-    fn test_hand_adds_cards_to_exhasting_hand() {
+    fn test_hand_draw_adds_cards_to_exhasting_hand() {
         let mut deck = Deck::new();
         let mut player = Player {
             name: String::from("Testy McTestFace"),