Merge branch 'dev' (0.3.9 features) into 'master'

Bug fixes:
* "Backup all rules and subscriptions" should work properly now.
* Allow disabling redirection of IE Temporary Files and Cookies, which resolves some rendering glitches.
* Resolve the issue that sometimes the profile folder cannot be deleted when using a portable version of Firefox with redirection of IE Temporary Files and Cookies enabled.
* ABP support: resolved a memory leak issue in processing of element hiding rules.

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Bug修复：
* “备份所有切换规则与订阅”功能现在能够正常工作。。
* 允许用户关闭IE临时文件和Cookie重定向，可以解决一部分网页渲染问题。
* 解决开启IE临时文件和Cookie重定向时，偶尔无法删除便携版配置文件夹的问题。
* ABP支持：解决处理元素隐藏规则时引起的内存泄漏。

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Please wait for translations from [babelzilla](http://www.babelzilla.org/forum/index.php?showtopic=7464) before merging this pull request.