Make IIS serve a header which will get IE into the latest standards mode

web_config_ie_edge.xml

<!--
It's all about "forcing" with MS stuff. *Force* IIS to serve a header which will
*force* IE not to use it's shitty compatibility mode, even if it's an intranet 
site and the client has "display intranet sites in compatibility view" ticked in
their compatibility prefs.

The alternative is to include the equivalent <meta http-equiv...> in your 
markup, but that will sometimes be ignored.

This header is discouraged by MS for production environments. Then again, MS is
the company that gave us Internet Explorer, so, like, what do they know anway? 

So anyway, if you're using IIS, shove the following up your web.config:
-->

<system.webServer>
    <httpProtocol>
        <customHeaders>
            <add name="X-UA-Compatible" value="IE=edge" />
        </customHeaders>
    </httpProtocol>
</system.webServer>