Added 0.5.1 release notes

Author: shyiko

changelog.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.  
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased](https://github.com/shyiko/mysql-binlog-connector-java/compare/0.5.0...HEAD)
+## [Unreleased](https://github.com/shyiko/mysql-binlog-connector-java/compare/0.5.1...HEAD)
 
 ### Added
  - A way to control Socket i/s buffering (using BinaryLogClient::setSocketFactory()). 
@@ -16,6 +16,13 @@ This is **BACKWARD-INCOMPATIBLE** change.
  - BINARY/VARBINARY deserialization ([#56](https://github.com/shyiko/mysql-binlog-connector-java/issues/56)).  
 This is **BACKWARD-INCOMPATIBLE** change as CHAR/VARCHAR/BINARY/VARBINARY are now returned as `byte[]` (which you can obviously convert to String with `new String(byte[], Charset)` if needed).
 
+## [0.5.1](https://github.com/shyiko/mysql-binlog-connector-java/compare/0.5.0...0.5.1) - 2016-10-18
+
+### Fixed
+ - ROWS_QUERY event deserialization ([#124](https://github.com/shyiko/mysql-binlog-connector-java/issues/124)).
+ - JSON length determination.
+ - GTID sync (GtidSet is now updated before BinaryLogClient.EventListener|s are notified).
+
 ## [0.5.0](https://github.com/shyiko/mysql-binlog-connector-java/compare/0.4.2...0.5.0) - 2016-10-06
 
 ### Added