jdg/MBProgressHUD — pull request #61 by 5D (2012-03-20 15:04:38+00:00)
Title: A very simple cancel function

- It does **not** support MBProgressHUD showing with `showWhileExecuting:onTarget:withObject:animated:` method.
- A delegate method `hudWasCanceled:` to do some clean up work when hud was canceled.