* Removed the ZIP subtypes from $wgMimeTypeBlacklist, they no longer need to be there.
* Added ZipDirectoryReader. Added some small ZIP files which are used to test its various error cases. Most were constructed with a hex editor.
* Fixed getStatusArray() to return a consistent type regardless of whether the error message has parameters. This allows error messages with no parameters to work with the Status object conversion code in UploadBase::verifyFile().