XUpload Update

The jquery plugin has been updated to a new version, the old wiki for the version this extension uses, has been mostly removed, many documentation and examples were lost, this is sad but not responsability of the extension, the old wiki with the old versione examples has been restored, so I'm opening a discussion, in wheter or not the extension should update to the current plugin version.

Take into account however, that the new jquery plugin does not have a complete wiki yet. mostly missing examples.