prevent IE9 defaulting to IE7 standards mode

Forsome websites (especially with SharePoint 2010 sites), IE9 can default to IE7 standards mode.

This can cause issues, especially with javascript libraries like jqwidgets.

To prevent this behaviour, add this meta code to the page:

 <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8; IE=EmulateIE9">  

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