Retry policy & timeout

- Retry policy and timeout support included
- Set default timeout 30 sec

Author: shaileshmishra

keys.py

@@ -0,0 +1,4 @@
+import config
+from twython import Twython, TwythonError
+# create a keys object by passing the necessary secret passwords
+keys = Twython(config.APIKey, config.delivery_token, config.environment, config.host)