better class name, use tagline instead of generic 'info'.
[#82916026] Homepage desktop CSS updates.
[#82916026] New hero unit images.
[#82916026] Homepage tablet tweaks. Parallax position fix.
[#82916026] Homepage hero unit mobile. Updated images.
obsolete css.
font size tweak for table.
[#82916026] Course page hero desktop/tablet updates.
obsolete css.
[#82916026] Course page mobile design updates.
[#82916026] Mobile retina fixes.