Merge branch 'feature-message' of https://github.com/coolsms/python-sdk into feature-message

Author: hosysy

README.md

@@ -79,8 +79,8 @@ MIT License
         print("Error Message : %s" % e.msg)
 ```
 
-If you want more examples. Visit to 'http://www.coolsms.co.kr/PYTHON_SDK_Example'.
+If you want more examples. Visit to 'http://www.coolsms.co.kr/Python_SDK_Example'.
 
 ## Information
 
-Look at the 'http://www.coolsms.co.kr/PYTHON_SDK_Start_here'
+Look at the 'http://www.coolsms.co.kr/Python_SDK_Start_here'