修复ff下focus定位节点不会自动缩进问题
[fixbug]by Jinqn 修改背景设置的bug
[fix]by Jinqn 背景图片放到uparse的demo里面
Merge pull request #54 from Jinqn/dev-1.3.0

Dev 1.3.0 修改背景设置的bug
[test]用例调整
修复preview时在 ie下加载js文件失败的问题
Merge remote-tracking branch 'origin/dev-1.3.0' into dev-1.3.0
Merge remote-tracking branch 'upstream/dev-1.3.0' into dev-1.3.0