CHANGELOG.md in ringcentral_sdk-0.5.0 vs CHANGELOG.md in ringcentral_sdk-0.5.1

@@ -1,7 +1,13 @@
 CHANGELOG
 ---------
+- **2015-12-08**: 0.5.1
+  - Add call recording transcription demo script via VoiceBase
+  - Fix PubNub unsubscribe bug
+  - Fix fax helper to support UTF-8 metadata with file attachment
+  - Update tests to support access token without refresh token
+  - Update sample scripts credentials file format to be more scalable
 - **2015-10-18**: 0.5.0
   - Add stubbed tests via `mocha`
   - Add `RingCentralSdk.new()` sugar method
   - Modify `RingCentralSdk::RC_SERVER_PRODUCTION` url from `RingCentralSdk::Sdk::RC_SERVER_Production`
   - Remove `lib/ringcentral_sdk/sdk.rb` file and `RingCentralSdk::Sdk` class
@@ -46,6 +52,6 @@
 - **2015-05-14**: 0.0.3
   - First public release
 - **2015-03-08**: 0.0.2
   - Convert methods from camelCase to under_scores
 - **2015-03-07**: 0.0.1
-  - Initial release
\ No newline at end of file
+  - Initial release