initial commit of responsive design test CSS
no access/ref links for small window, test new breakpoint

test break point for small windows at 720px
HeadTitle for small window, 600px breakpoint

HeadTitle rm bold text, size 1.2em
Working copy of responsive layout

small viewport layout: 1 column, 95% content/image width. 624px
breakpoint. large viewport layout: 2 column, 20% menu, 74% content.
Merge pull request #1 from oracc/responsive-test

Responsive design CSS