updated contents from Atlas repo

decorators/fibo_demo.py

@@ -0,0 +1,10 @@
+from clockdeco import clock
+
+@clock
+def fibonacci(n):
+    if n < 2:
+        return n
+    return fibonacci(n-2) + fibonacci(n-1)
+
+if __name__=='__main__':
+    print(fibonacci(6))