MS-523 Update exit button in IE8
MS-523 Update background-cover images to only be 400px until image size is consistent
MS-523 Update exit button position to be inline with header tagline/logo
Merge branch 'MS-523-article-image-sizing-and-close-button' into develop
Merge branch 'develop' of http://github.com/myplanetdigital/neompd into MS-526-fix-hw-acceleration