Merge pull request #32 from Jinqn/dev-1.3.0

Dev 1.3.0 添加粘贴事件,插入粘贴板图片
更新
Merge remote-tracking branch 'origin/dev-1.3.0' into dev-1.3.0
[test]
添加用例:script/style标签过滤
修正用例:Ueditor.js-> focus()/blur()
Merge branch 'dev-1.3.0' of https://github.com/campaign/ueditor into dev-1.3.0
[test]time用例修正
[test]添加用例preview
Merge pull request #33 from Jinqn/dev-1.3.0

修改domUtils.addClass方法,去除前后空格