JimLiu/angular-ui-tree — pull request #206 by yolo2013 (2014-08-14 12:41:30+00:00)
Title: When scroll to the parent bottom or top.

解决当父元素不是body时，拖动到顶部或底部，父元素滚动条不会随着滚动。

The tree's scrollable parent element not the body,Drag a node to the bottom or top side,the parent' scroll can not be trigger.