Move useful icons to more visible area of website

The KubeVirt website has some really useful links in icon form, such as our social media accounts, calendar, slack, mailing list, etc. As @dhiller pointed out today on the mailing list, they are a bit hidden down the bottom of the page. 

These would be better served in a more prominent/obvious place on the website. Perhaps even in the banner so that they trail scroll. 

