Prevent IE9 from entering Compatibility View.

+ Add meta X-UA-Compatible element.
+ http://stackoverflow.com/questions/6348959/how-to-disable-compatibility-view-in-ie
+ http://stackoverflow.com/questions/12894082/how-to-prevent-ie9-from-rendering-intranet-sites-in-compatibility-mode

This has been tested using WAM machines and seems to be working correctly.