changes fron user feedback, tweaks to headings, responsive media queries
new copy for headings'
new copy for headings and width and font-size tweaks for the new content
Merge branch 'master' of https://github.com/unepwcmc/unep-wcmc.org into gh-pages
Merge branch 'gh-pages' of https://github.com/unepwcmc/unep-wcmc.org into gh-pages