#152 FileUpload breaks Response.Redirect

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If there is a anthem:FileUpload control in the page, Response.Redirect no longer works because the IOFrame expects a response to be wrapped in a textarea for processing.

Propose fix: Wrap the response (window.location = ...) with a textarea.
See attached code fragment for Manager.cs OnUnload function or http://pastebin.com/gmDXNpY3

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Anthem.Manager code fragment