Creating the Device Access section
Fixes #52 across the site, removes underline on lilinks unitl hover.  No inline with dartlang.org
#52 - removes underline on section item headings
Removes WebFundamentals from footer and centers the elements #381
#382 - removing back to top
Fixes #383 - reducing the bottom padding on the footer
Update to #381 - when at around 620px the formatting would break
Merge branch 'master' of github.com:google/WebFundamentals