remove min width for responsiveness
fix for reponsive nav and content
hide demo video on small devices (<768)
hide homepage tagline on tablet and mobile
homepage share-bar is now responsive
video border fix
responsive: homepage hero type sizes
responsive collasping menu
responsive: add padding for press logo
responsive: blog post authors

hide author circles on tablets/phones and replace with text
blog post nested column fix
responsive: help page

hide left nav on tablet/phone
about layout fixes
responsive: contributor styles
responsive: hide help hero tagline
Merge branch 'ResponsiveSiteUpdates'