Update changeling

Author: pissang

doc/changelog-en.html

@@ -54,6 +54,7 @@ <h3>2.2.4<small> (2015-06-17) </small></h3>
                     <li>[^] Fix timeline not dispose bug when setOption with notMerge true。Fix <a href="https://github.com/ecomfe/echarts/issues/1601">#1601 »</a></li>
                     <li>[^] Treemap add root option</li>
                     <li>[^] Fix arrow drag and zoom bug in force。Fix <a href="https://github.com/ecomfe/echarts/issues/1604">#1604 »</a></li>
+                    <li>[^] Fix single series addData animation bug</li>
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doc/changelog.html

@@ -54,6 +54,7 @@ <h3>2.2.4<small> (2015-06-17) </small></h3>
                     <li>[^] 修复setOption中notMerge为true时timeline不销毁的bug。Fix <a href="https://github.com/ecomfe/echarts/issues/1601">#1601 »</a></li>
                     <li>[^] 矩形树图加入 root 配置项</li>
                     <li>[^] 修复力导向中拖拽和缩放时，箭头不会跟着拖动和缩放的bug。Fix <a href="https://github.com/ecomfe/echarts/issues/1604">#1604 »</a></li>
+                    <li>[^]修复 addData 在只有一个系列的时候的动画bug</li>
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