Ensure IE compatibility mode is disabled

We've decided to use IE=edge for IE compatibility because this will put IE into the highest available mode for each version of IE.

See: http://stackoverflow.com/questions/3449286/force-ie-compatibility-mode-off-in-ie-using-tags

Seems like a good idea to run Jasmine tests in the highest mode available. (IE 9 should run in IE9 mode, not IE8 compat mode)

Fixes the following error on IE8 when running jasmine:
Object doesn't support this property or method  jasmine-html.js, line
229 character 7
>> getContainer().querySelector
undefined

fixes pivotal/jasmine#417