Made 20px the new default font size.
Made 1.45em the new default line height for the site.
Experimenting with making the header border stretch across the page.
Fixed footer and made it stretch across the page too.
Changed border for footer so that it matches the thinner style the way it used to be.
Rather than making the lines stretch all the way across the screen, made the lines only slightly bigger than the content.
Merge branch 'big-lines'