Add changelog for 0.6.0 note playlist loading refactor and karma testing support

@@ -161,8 +161,11 @@ bandwidth and viewport dimensions.
     - [Best RESOLUTION variant] OR [Best BANDWIDTH variant] OR [inital playlist in manifest]
 
 ## Release History
- - 0.5.0: cookie-based content protection support (see `withCredentials`)
- - 0.4.0: Live stream support
- - 0.3.0: Performance fixes for high-bitrate streams
- - 0.2.0: Basic playback and adaptive bitrate selection
- - 0.1.0: Initial release
+- 0.6.0:
+  - Refactor playlist loading
+  - Add testing via karma
+- 0.5.0: cookie-based content protection support (see `withCredentials`)
+- 0.4.0: Live stream support
+- 0.3.0: Performance fixes for high-bitrate streams
+- 0.2.0: Basic playback and adaptive bitrate selection
+- 0.1.0: Initial release