Update README.md

Author: x3388638

example/README.md

@@ -6,7 +6,7 @@ npm start
 ```
 
 ## Usage
-http://localhost:8080/x3388638
+http://localhost:8080/x3388638  
 http://localhost:8080/x3388638?json=true
 
 and now you can render it at server side or use AJAX to get the calendar HTML string at client side