tciuro/NoticeView — pull request #39 by plu (2013-02-05 18:00:45+00:00)
Title: Use own queue to be able to cancel queued noticeViews.

I have changed the `NSOperationQueue` implementation a little bit: Instead of using the `mainQueue`, now we have an own seperate queue for the `NoticeViewOperation` operations. This gives us the advantage, that we can cancel all of them, if necessary:

```objc
[NSOperationQueue cancelAllNoticeViews];
```