Add skeleton code for exercise hangman

Author: junming403

exercises/hangman/hangman.py

@@ -0,0 +1,13 @@
+class Hangman(object):
+    def __init__(self, word):
+        self.remainingGuesses = 9
+        self.status = 'busy'
+
+    def guess(self, char):
+        pass
+
+    def get_masked_word(self):
+        pass
+
+    def get_status(self):
+        pass