adding changelog entry

Author: Jonas Weismueller

CHANGELOG.md

@@ -4,10 +4,12 @@ Change Log
 All notable changes to this project are noted in this file. This project adheres to [Semantic
 Versioning](http://semver.org/).
 
-1.1.0
+1.1.1
 -----
 
 - Added BILLING_SCRAPE_TIMEOUT to be able to set a different value then the default of 10 seconds
+- Bugfix: convert subscription_id to string, since azure management compute module raises an 
+  Exception if a unicode string is passed as an argument
 
 1.0.0
 -----