Add img max-width rule to base
Adds top/bottom margin utility classes.
Version 0.6.0
Change margin utility syntax, make important
Make headers level 1-3 responsive. Add screen size variables.
Merge pull request #19 from Scotchester/gh-pages

Adds img max-width rule; margin utility classes
Tweak h4 margin
Merge upstream
Merge pull request #20 from virginiacc/gh-pages

Responsive headers
Change version number
Merge pull request #21 from virginiacc/gh-pages

Change version number