Hid 1st and 3rd footer column

I hid the 1st and 3rd column in the footer on xs widths.
Reworked the feature spotlight for smaller devices

Removed the 3rd column in the feature spotlight and made the two others
into col-xs(and sm)-6. Finally removed the margin-top from the
highlights in smaller devices.
Merge remote-tracking branch 'origin/footer' into development
Merge remote-tracking branch 'origin/development'
Merge branch 'master' of https://github.com/FredrikAugust/C-Mail-Website